diff --git a/README.md b/README.md
index e9c5e6a8a..588115f77 100755
--- a/README.md
+++ b/README.md
@@ -34,17 +34,23 @@ You are welcome to contribute to Engagement Cloud for Magento! You can either:
 - Fix a bug: please fork this repo and submit the Pull Request to our [Develop branch](https://github.com/dotmailer/dotmailer-magento-extension/tree/develop)
 Request a feature on our [roadmap](https://roadmap.dotdigital.com)
 
+# V6.4.13
+
+##### Bug Fixes
+- We've fixed a bug that caused the catalog sync to skip products if invalid data keys were supplied.
+- We've fixed a bug related to the use of `utf8_decode` in email templates (note this discontinues support for emojis in email subject lines).
+- We've fixed a minor error thrown during the Engagement Cloud template sync. 
+
 # V6.4.12
 
 ##### Improvements
-
-  * We've improved the performance of the product sync process by setting a limit when querying products before import
-  * Resubscribed contacts weren't added back to the "subscriber" address book; they are now
-  * Configurable, grouped, and bundled products are now correctly synced to Engagement Cloud with the lowest relevant price of their children
+- We've improved the performance of the product sync process by setting a limit when querying products before import
+- Resubscribed contacts weren't added back to the "subscriber" address book; they are now
+- Configurable, grouped, and bundled products are now correctly synced to Engagement Cloud with the lowest relevant price of their children
 
 ##### Bug Fixes
-  * We've fixed incorrect syntax in the Order model (#309)
-  * We've fixed an issue that caused errors within the Sweet Tooth (Smile.io) integration
+- We've fixed incorrect syntax in the Order model (#309)
+- We've fixed an issue that caused errors within the Sweet Tooth (Smile.io) integration
 
 # V6.4.11
 
diff --git a/code/Dotdigitalgroup/Email/Block/Adminhtml/Column/Renderer/Template.php b/code/Dotdigitalgroup/Email/Block/Adminhtml/Column/Renderer/Template.php
deleted file mode 100755
index 119d620f9..000000000
--- a/code/Dotdigitalgroup/Email/Block/Adminhtml/Column/Renderer/Template.php
+++ /dev/null
@@ -1,23 +0,0 @@
-<?php
-
-class Dotdigitalgroup_Email_Block_Adminhtml_Column_Renderer_Template
-    extends Mage_Adminhtml_Block_Widget_Grid_Column_Renderer_Abstract
-{
-
-    /**
-     * Render grid columns.
-     *
-     * @param Varien_Object $row
-     *
-     * @return string
-     */
-    public function render(Varien_Object $row)
-    {
-        if (Mage::helper('ddg/transactional')->isDotmailerTemplate($row->getTemplateCode())) {
-
-            return utf8_decode($row->getTemplateSubject());
-        }
-
-        return Mage::helper('adminhtml')->__($row->getTemplateSubject());
-    }
-}
diff --git a/code/Dotdigitalgroup/Email/Block/Adminhtml/System/Email/Grid.php b/code/Dotdigitalgroup/Email/Block/Adminhtml/System/Email/Grid.php
deleted file mode 100755
index bf8c33a46..000000000
--- a/code/Dotdigitalgroup/Email/Block/Adminhtml/System/Email/Grid.php
+++ /dev/null
@@ -1,75 +0,0 @@
-<?php
-
-class Dotdigitalgroup_Email_Block_Adminhtml_System_Email_Grid extends Mage_Adminhtml_Block_System_Email_Template_Grid
-{
-    /**
-     * @return $this
-     * @throws Exception
-     */
-    protected function _prepareColumns()
-    {
-        $this->addColumn('template_id',
-            array(
-                  'header'=>Mage::helper('adminhtml')->__('ID'),
-                  'index'=>'template_id'
-            )
-        );
-
-        $this->addColumn('code',
-            array(
-                'header'=>Mage::helper('adminhtml')->__('Template Name'),
-                'index'=>'template_code'
-        ));
-
-        $this->addColumn('added_at',
-            array(
-                'header'=>Mage::helper('adminhtml')->__('Date Added'),
-                'index'=>'added_at',
-                'gmtoffset' => true,
-                'type'=>'datetime'
-        ));
-
-        $this->addColumn('modified_at',
-            array(
-                'header'=>Mage::helper('adminhtml')->__('Date Updated'),
-                'index'=>'modified_at',
-                'gmtoffset' => true,
-                'type'=>'datetime'
-        ));
-
-        $this->addColumn('subject',
-            array(
-                'header'=>Mage::helper('adminhtml')->__('Subject'),
-                'index'=>'template_subject',
-                'renderer' => 'ddg_automation/adminhtml_column_renderer_template',
-        ));
-        /*
-        $this->addColumn('sender',
-            array(
-                'header'=>Mage::helper('adminhtml')->__('Sender'),
-                'index'=>'template_sender_email',
-                'renderer' => 'adminhtml/system_email_template_grid_renderer_sender'
-        ));
-        */
-        $this->addColumn('type',
-            array(
-                'header'=>Mage::helper('adminhtml')->__('Template Type'),
-                'index'=>'template_type',
-                'filter' => 'adminhtml/system_email_template_grid_filter_type',
-                'renderer' => 'adminhtml/system_email_template_grid_renderer_type'
-        ));
-
-        $this->addColumn('action',
-            array(
-                'header'	=> Mage::helper('adminhtml')->__('Action'),
-                'index'		=> 'template_id',
-                'sortable'  => false,
-                'filter' 	=> false,
-                'width'		=> '100px',
-                'renderer'  => 'adminhtml/system_email_template_grid_renderer_action'
-        ));
-
-        return $this;
-    }
-}
-
diff --git a/code/Dotdigitalgroup/Email/Model/Adminhtml/Email/Template.php b/code/Dotdigitalgroup/Email/Model/Adminhtml/Email/Template.php
index f1bb931e6..eca46c56c 100755
--- a/code/Dotdigitalgroup/Email/Model/Adminhtml/Email/Template.php
+++ b/code/Dotdigitalgroup/Email/Model/Adminhtml/Email/Template.php
@@ -10,7 +10,7 @@ class Dotdigitalgroup_Email_Model_Adminhtml_Email_Template extends Mage_Adminhtm
     protected function _afterLoad()
     {
         //decompress the title
-        $this->setTemplateSubject(utf8_decode($this->getTemplateSubject()));
+        $this->setTemplateSubject($this->getTemplateSubject());
         $templateText = $this->getTemplateText();
         $transactionalHelper = Mage::helper('ddg/transactional');
         if ($transactionalHelper->isStringCompressed($templateText)) {
diff --git a/code/Dotdigitalgroup/Email/Model/Connector/Product.php b/code/Dotdigitalgroup/Email/Model/Connector/Product.php
index 9a762b0fa..816e16ebf 100755
--- a/code/Dotdigitalgroup/Email/Model/Connector/Product.php
+++ b/code/Dotdigitalgroup/Email/Model/Connector/Product.php
@@ -146,6 +146,9 @@ public function __construct(Mage_Catalog_Model_Product $product)
             foreach ($options as $option) {
                 $count      = 0;
                 $title      = str_replace(' ', '', $option->getDefaultTitle());
+                if (!$this->textIsValidForInsightDataKey($title)) {
+                    continue;
+                }
                 $selections = $option->getSelections();
                 $sOptions   = array();
                 foreach ($selections as $selection) {
@@ -176,6 +179,9 @@ public function __construct(Mage_Catalog_Model_Product $product)
                 $label   = strtolower(
                     str_replace(' ', '', $productAttribute['label'])
                 );
+                if (!$this->textIsValidForInsightDataKey($label)) {
+                    continue;
+                }
                 $options = array();
                 foreach ($productAttribute['values'] as $attribute) {
                     $options[$count]['option'] = $attribute['default_label'];
@@ -341,4 +347,17 @@ private function formatPriceValues()
             ''
         );
     }
+
+    /**
+     * Ensure text matches insight data key restrictions
+     * https://support.dotmailer.com/hc/en-gb/articles/212214538-Using-Insight-data-developers-guide-#restrictkeys
+     *
+     * @param string $text
+     *
+     * @return false|int
+     */
+    private function textIsValidForInsightDataKey($text)
+    {
+        return preg_match('/^[a-zA-Z_\\\\-][a-zA-Z0-9_\\\\-]*$/', $text);
+    }
 }
diff --git a/code/Dotdigitalgroup/Email/Model/Email/Template.php b/code/Dotdigitalgroup/Email/Model/Email/Template.php
index 450f65c5b..d7b43ee5e 100755
--- a/code/Dotdigitalgroup/Email/Model/Email/Template.php
+++ b/code/Dotdigitalgroup/Email/Model/Email/Template.php
@@ -155,7 +155,7 @@ protected function _beforeSave()
     protected function _afterLoad()
     {
         //decompress the subject
-        $this->setTemplateSubject(utf8_decode($this->getTemplateSubject()));
+        $this->setTemplateSubject($this->getTemplateSubject());
         $templateText = $this->getTemplateText();
         $transactionalHelper = Mage::helper('ddg/transactional');
         //decompress the content body
diff --git a/code/Dotdigitalgroup/Email/Model/Template.php b/code/Dotdigitalgroup/Email/Model/Template.php
index 01e2df693..54dfa2da0 100755
--- a/code/Dotdigitalgroup/Email/Model/Template.php
+++ b/code/Dotdigitalgroup/Email/Model/Template.php
@@ -168,11 +168,6 @@ class Dotdigitalgroup_Email_Model_Template extends Mage_Core_Model_Abstract
         'product_price_alert_template' => self::XML_PATH_DDG_TEMPLATE_PRODUCT_PRICE_ALERT
     ];
 
-    /**
-     * @var array
-     */
-    public $proccessedCampaings;
-
     /**
      * Load email_template by code/name.
      *
@@ -212,30 +207,31 @@ public function deleteTemplateByCode($templatecode)
     public function sync()
     {
         $result = ['store' => 'Stores : ', 'message' => 'Done.'];
-        $lastWebsiteId = '0';
         $helper = Mage::helper('ddg');
+        $processedCampaigns = [];
+
         /** @var Mage_Core_Model_Store $store */
         foreach (Mage::app()->getStores(true) as $store) {
-            //store not enabled to sync
-            if (! $helper->isStoreEnabled($store)) {
+
+            if (!$helper->isStoreEnabled($store)) {
                 continue;
             }
-            //reset the campaign ids for each website
+
             $websiteId = $store->getWebsiteId();
-            if ($websiteId != $lastWebsiteId) {
-                $this->proccessedCampaings = [];
-                $lastWebsiteId = $websiteId;
+            if (empty($processedCampaigns[$websiteId])) {
+                $processedCampaigns[$websiteId] = [];
             }
+
             foreach($this->templateConfigIdToDotmailerConfigPath as $configTemplateId => $dotConfigPath) {
 
                 $campaignId = $store->getConfig($dotConfigPath);
                 $configPath = $this->templateConfigMapping[$configTemplateId];
                 $emailTemplateId = $store->getConfig($configPath);
 
-                if ($campaignId && $emailTemplateId && ! in_array($campaignId, $this->proccessedCampaings)) {
+                if ($campaignId && $emailTemplateId && !in_array($campaignId, $processedCampaigns[$websiteId])) {
                     $this->syncEmailTemplate($campaignId, $emailTemplateId, $store);
                     $result['store'] .= ', ' . $store->getCode();
-                    $this->proccessedCampaings[$campaignId] = $campaignId;
+                    $processedCampaigns[$websiteId][$campaignId] = $campaignId;
                 }
             }
         }
@@ -279,7 +275,7 @@ public function saveTemplate($template, $dmCampaign, $campaignId, $origTemplateC
         try {
             $template->setTemplateCode($templateName)
                 ->setOrigTemplateCode($origTemplateCode)
-                ->setTemplateSubject(utf8_encode($dmCampaign->subject))
+                ->setTemplateSubject($dmCampaign->subject)
                 ->setTemplateText($dmCampaign->processedHtmlContent)
                 ->setTemplateType(Mage_Core_Model_Template::TYPE_HTML)
                 ->setTemplateSenderName($dmCampaign->fromName)
@@ -313,7 +309,7 @@ private function updateTemplateById($dmCampaign, $campaignId, $templateId, $orig
                 ->setTemplateSenderName($dmCampaign->fromName)
                 ->setTemplateText($dmCampaign->processedHtmlContent)
                 ->setTemplateType(Mage_Core_Model_Template::TYPE_HTML)
-                ->setTemplateSubject(utf8_encode($dmCampaign->subject))
+                ->setTemplateSubject($dmCampaign->subject)
                 ->setTemplateSenderEmail($dmCampaign->fromAddress->email);
 
             $template->save();
@@ -355,4 +351,4 @@ public function saveTemplateWithConfigPath($templateConfigPath, $campaignId, $sc
 
         return $this->saveTemplate($template, $dmCampaign, $campaignId, $templateConfigPath);
     }
-}
\ No newline at end of file
+}
diff --git a/code/Dotdigitalgroup/Email/etc/config.xml b/code/Dotdigitalgroup/Email/etc/config.xml
index 3f8fd6b77..8b9ef48a0 100755
--- a/code/Dotdigitalgroup/Email/etc/config.xml
+++ b/code/Dotdigitalgroup/Email/etc/config.xml
@@ -2,7 +2,7 @@
 <config>
     <modules>
         <Dotdigitalgroup_Email>
-            <version>6.4.12</version>
+            <version>6.4.13</version>
         </Dotdigitalgroup_Email>
     </modules>
     <frontend>
@@ -158,11 +158,6 @@
             <ddg_automation>
                 <class>Dotdigitalgroup_Email_Block</class>
             </ddg_automation>
-            <adminhtml>
-                <rewrite>
-                    <system_email_template_grid>Dotdigitalgroup_Email_Block_Adminhtml_System_Email_Grid</system_email_template_grid>
-                </rewrite>
-            </adminhtml>
         </blocks>
         <events>
             <admin_system_config_changed_section_connector_api_credentials>
diff --git a/code/Dotdigitalgroup/Email/etc/system.xml b/code/Dotdigitalgroup/Email/etc/system.xml
index 7777b38b6..83f8a1002 100755
--- a/code/Dotdigitalgroup/Email/etc/system.xml
+++ b/code/Dotdigitalgroup/Email/etc/system.xml
@@ -2300,7 +2300,7 @@
                             <show_in_store>1</show_in_store>
                         </newsletter_title>
                         <newsletter_subscription_success_email_template translate="label" module="ddg">
-                            <label>Succces Email Templates</label>
+                            <label>Success Email Templates</label>
                             <frontend_type>select</frontend_type>
                             <source_model>ddg_automation/adminhtml_source_campaigns</source_model>
                             <backend_model>ddg_automation/adminhtml_backend_template</backend_model>
diff --git a/composer.json b/composer.json
index 76caeb123..ad3fb71b5 100755
--- a/composer.json
+++ b/composer.json
@@ -4,12 +4,6 @@
     "license":"OSL-3.0",
     "homepage":"https://github.com/dotmailer/dotmailer-magento-extension",
     "description":"Marketing automation for magento.",
-    "authors":[
-        {
-            "name":"Calin Diacon",
-            "email":"calin.diacon@dotmailer.com"
-        }
-    ],
     "require":{
         "magento-hackathon/magento-composer-installer":"*"
     }