diff --git a/tools/projmgr/schemas/common.schema.json b/tools/projmgr/schemas/common.schema.json
index 2ccbab821..e89f28f86 100644
--- a/tools/projmgr/schemas/common.schema.json
+++ b/tools/projmgr/schemas/common.schema.json
@@ -648,6 +648,7 @@
         },
         "set": {
           "type": "string",
+          "pattern": "^.+\\..+$",
           "description": "Set configuration option in the format 'config-id.select'"
         },
         "info": {
diff --git a/tools/projmgr/src/ProjMgrWorker.cpp b/tools/projmgr/src/ProjMgrWorker.cpp
index 138d26c1b..4414dc1a9 100644
--- a/tools/projmgr/src/ProjMgrWorker.cpp
+++ b/tools/projmgr/src/ProjMgrWorker.cpp
@@ -561,9 +561,8 @@ bool ProjMgrWorker::DiscoverMatchingLayers(ContextItem& context) {
       const auto& type = m_parser->GetGenericClayers()[*item.filename].type;
       msg += "\n  " + (type.empty() ? "" : type + ": ") + *item.filename;
       for (const auto& connect : item.connections) {
-        if (!connect->set.empty()) {
-          msg += "\n    set: " + connect->set + " (" + (connect->info.empty() ? "" : connect->info + " - ") + connect->connect + ")";
-        }
+        msg += "\n    " + (connect->set.empty() ? "" : "set: " + connect->set + " ") + "(" +
+          (connect->info.empty() ? "" : connect->info + " - ") + connect->connect + ")";
       }
     }
     ProjMgrLogger::Debug(msg);
@@ -614,33 +613,24 @@ bool ProjMgrWorker::DiscoverMatchingLayers(ContextItem& context) {
 
   // print all valid configuration options
   if (context.validConnections.size() > 0) {
-    map<int, map<string, map<string, ConnectPtrVec>>> configurationOptions;
-    int index = 1;
+    map<int, map<string, map<string, set<const ConnectItem*>>>> configurationOptions;
+    int index = 0;
     for (const auto& combination : context.validConnections) {
-      bool hasConfigOption = false;
+      index++;
       for (const auto& item : combination) {
-        if (!item.type->empty()) {
-          hasConfigOption = true;
-          configurationOptions[index][*item.type][*item.filename];
-        }
         for (const auto& connect : item.connections) {
-          if (!connect->set.empty()) {
-            hasConfigOption = true;
-            configurationOptions[index][*item.type][*item.filename].push_back(connect);
-          }
+          configurationOptions[index][*item.type][*item.filename].insert(connect);
         }
       }
-      if (hasConfigOption) {
-        index++;
-      }
     }
     for (const auto& [index, types] : configurationOptions) {
       string msg = "configuration match #" + to_string(index) + ":";
       for (const auto& [type, filenames] : types) {
         for (const auto& [filename, options] : filenames) {
           msg += "\n  " + (type.empty() ? "" : type + ": ") + filename;
-          for (const auto& option : options) {
-            msg += "\n    set: " + option->set + " (" + (option->info.empty() ? "" : option->info + " - ") + option->connect + ")";
+          for (const auto& connect : options) {
+            msg += "\n    " + (connect->set.empty() ? "" : "set: " + connect->set + " ") + "(" +
+              (connect->info.empty() ? "" : connect->info + " - ") + connect->connect + ")";
           }
         }
       }
@@ -711,20 +701,19 @@ ConnectionsCollectionMap ProjMgrWorker::ClassifyConnections(const ConnectionsCol
     // get common connections
     ConnectPtrVec commonConnections;
     bool hasMultipleSelect = false;
-    for (const auto& [configId, connections] : connectionsMap) {
-      if (connections.size() > 1) {
+    for (const auto& [configId, connectionsEntry] : connectionsMap) {
+      if (!configId.empty()) {
         // 'config-id' has multiple 'select' choices
         hasMultipleSelect = true;
-      }
-      else {
+      } else {
         // 'config-id' has only one 'select'
-        commonConnections.insert(commonConnections.end(), connections.begin(), connections.end());
+        commonConnections.insert(commonConnections.end(), connectionsEntry.begin(), connectionsEntry.end());
       }
     }
     // iterate over 'select' choices
     if (hasMultipleSelect) {
       for (const auto& [configId, selectConnections] : connectionsMap) {
-        if (selectConnections.size() > 1) {
+        if (!configId.empty()) {
           for (const auto& connect : selectConnections) {
             ConnectionsCollection collection = { collectionEntry.filename, collectionEntry.type, commonConnections };
             collection.connections.push_back(connect);
diff --git a/tools/projmgr/test/data/TestLayers/config.clayer.yml b/tools/projmgr/test/data/TestLayers/config.clayer.yml
index da2bea4c8..f6307c097 100644
--- a/tools/projmgr/test/data/TestLayers/config.clayer.yml
+++ b/tools/projmgr/test/data/TestLayers/config.clayer.yml
@@ -21,3 +21,7 @@ layer:
     - connect: "test connect common T"
       provides:
         - connectT
+
+    - connect: "test connect common U"
+      provides:
+        - connectU
diff --git a/tools/projmgr/test/src/ProjMgrUnitTests.cpp b/tools/projmgr/test/src/ProjMgrUnitTests.cpp
index 7e968d151..39c7a1eee 100644
--- a/tools/projmgr/test/src/ProjMgrUnitTests.cpp
+++ b/tools/projmgr/test/src/ProjMgrUnitTests.cpp
@@ -642,18 +642,27 @@ TEST_F(ProjMgrUnitTests, ListLayersCompatible) {
 debug csolution: validating connections for context 'genericlayers.CompatibleLayers\\+AnyBoard'\n\
 debug csolution: validating combined connections:\n\
   .*/TestLayers/genericlayers.cproject.yml\n\
+    \\(Project Connections\\)\n\
   .*/ARM/RteTest_DFP/0.2.0/Layers/board1.clayer.yml\n\
+    \\(Board1 Connections\\)\n\
   .*/ARM/RteTest_DFP/0.2.0/Layers/testvariant.clayer.yml\n\
+    \\(Test variant Connections\\)\n\
 debug csolution: connections are valid\n\
 debug csolution: validating combined connections:\n\
   .*/TestLayers/genericlayers.cproject.yml\n\
+    \\(Project Connections\\)\n\
   .*/ARM/RteTest_DFP/0.2.0/Layers/board2.clayer.yml\n\
+    \\(Board2 Connections\\)\n\
   .*/ARM/RteTest_DFP/0.2.0/Layers/testvariant.clayer.yml\n\
+    \\(Test variant Connections\\)\n\
 debug csolution: connections are valid\n\
 debug csolution: validating combined connections:\n\
   .*/TestLayers/genericlayers.cproject.yml\n\
+    \\(Project Connections\\)\n\
   .*/ARM/RteTest_DFP/0.2.0/Layers/board3.clayer.yml\n\
+    \\(Board3 Connections\\)\n\
   .*/ARM/RteTest_DFP/0.2.0/Layers/testvariant.clayer.yml\n\
+    \\(Test variant Connections\\)\n\
 debug csolution: connections are valid\n\
 debug csolution: multiple clayers match type 'Board':\n\
   .*/ARM/RteTest_DFP/0.2.0/Layers/board1.clayer.yml\n\
@@ -662,14 +671,26 @@ debug csolution: multiple clayers match type 'Board':\n\
 debug csolution: clayer of type 'TestVariant' was uniquely found:\n\
   .*/ARM/RteTest_DFP/0.2.0/Layers/testvariant.clayer.yml\n\
 debug csolution: configuration match #1:\n\
+  .*/TestLayers/genericlayers.cproject.yml\n\
+    \\(Project Connections\\)\n\
   Board: .*/ARM/RteTest_DFP/0.2.0/Layers/board1.clayer.yml\n\
+    \\(Board1 Connections\\)\n\
   TestVariant: .*/ARM/RteTest_DFP/0.2.0/Layers/testvariant.clayer.yml\n\
+    \\(Test variant Connections\\)\n\
 debug csolution: configuration match #2:\n\
+  .*/TestLayers/genericlayers.cproject.yml\n\
+    \\(Project Connections\\)\n\
   Board: .*/ARM/RteTest_DFP/0.2.0/Layers/board2.clayer.yml\n\
+    \\(Board2 Connections\\)\n\
   TestVariant: .*/ARM/RteTest_DFP/0.2.0/Layers/testvariant.clayer.yml\n\
+    \\(Test variant Connections\\)\n\
 debug csolution: configuration match #3:\n\
+  .*/TestLayers/genericlayers.cproject.yml\n\
+    \\(Project Connections\\)\n\
   Board: .*/ARM/RteTest_DFP/0.2.0/Layers/board3.clayer.yml\n\
+    \\(Board3 Connections\\)\n\
   TestVariant: .*/ARM/RteTest_DFP/0.2.0/Layers/testvariant.clayer.yml\n\
+    \\(Test variant Connections\\)\n\
 ";
 
   const string& errStr = streamRedirect.GetErrorString();
@@ -700,23 +721,31 @@ TEST_F(ProjMgrUnitTests, ListLayersConfigurations) {
 debug csolution: configuration match #1:\n\
   .*/TestLayers/config.clayer.yml\n\
     set: set1.select1 \\(set 1 select 1 - connect R\\)\n\
+    \\(test connect common T\\)\n\
+    \\(test connect common U\\)\n\
   .*/TestLayers/config.cproject.yml\n\
     set: set1.select1 \\(set 1 select 1 - project X\\)\n\
   Config1: .*/ARM/RteTest_DFP/0.2.0/Layers/config1.clayer.yml\n\
     set: set1.select1 \\(set 1 select 1 - connect A\\)\n\
     set: set2.select1 \\(set 2 select 1 - connect C\\)\n\
+    \\(test connect common E\\)\n\
   Config2: .*/ARM/RteTest_DFP/0.2.0/Layers/config2.clayer.yml\n\
     set: set1.select1 \\(set 1 select 1 - connect F\\)\n\
+    \\(test connect common H\\)\n\
 debug csolution: configuration match #2:\n\
   .*/TestLayers/config.clayer.yml\n\
     set: set1.select2 \\(set 1 select 2 - connect S\\)\n\
+    \\(test connect common T\\)\n\
+    \\(test connect common U\\)\n\
   .*/TestLayers/config.cproject.yml\n\
     set: set1.select2 \\(set 1 select 2 - project Y\\)\n\
   Config1: .*/ARM/RteTest_DFP/0.2.0/Layers/config1.clayer.yml\n\
     set: set1.select2 \\(set 1 select 2 - connect B\\)\n\
     set: set2.select2 \\(set 2 select 2 - connect D\\)\n\
+    \\(test connect common E\\)\n\
   Config2: .*/ARM/RteTest_DFP/0.2.0/Layers/config2.clayer.yml\n\
     set: set1.select2 \\(set 1 select 2 - connect G\\)\n\
+    \\(test connect common H\\)\n\
 ";
 
   const string& errStr = streamRedirect.GetErrorString();
@@ -772,16 +801,23 @@ TEST_F(ProjMgrUnitTests, ListLayersUniquelyCompatibleBoard) {
 debug csolution: validating connections for context 'genericlayers.CompatibleLayers\\+Board3'\n\
 debug csolution: validating combined connections:\n\
   .*/TestLayers/genericlayers.cproject.yml\n\
-  .*/ARM/RteTest_DFP/0.2.0/Layers/board3.clayer.yml\n\
-  .*/ARM/RteTest_DFP/0.2.0/Layers/testvariant.clayer.yml\n\
+    \\(Project Connections\\)\n\
+  Board: .*/ARM/RteTest_DFP/0.2.0/Layers/board3.clayer.yml\n\
+    \\(Board3 Connections\\)\n\
+  TestVariant: .*/ARM/RteTest_DFP/0.2.0/Layers/testvariant.clayer.yml\n\
+    \\(Test variant Connections\\)\n\
 debug csolution: connections are valid\n\
 debug csolution: clayer of type 'Board' was uniquely found:\n\
   .*/ARM/RteTest_DFP/0.2.0/Layers/board3.clayer.yml\n\
 debug csolution: clayer of type 'TestVariant' was uniquely found:\n\
   .*/ARM/RteTest_DFP/0.2.0/Layers/testvariant.clayer.yml\n\
 debug csolution: configuration match #1:\n\
+  .*/TestLayers/genericlayers.cproject.yml\n\
+    \\(Project Connections\\)\n\
   Board: .*/ARM/RteTest_DFP/0.2.0/Layers/board3.clayer.yml\n\
+    \\(Board3 Connections\\)\n\
   TestVariant: .*/ARM/RteTest_DFP/0.2.0/Layers/testvariant.clayer.yml\n\
+    \\(Test variant Connections\\)\n\
 ";
 
   const string& errStr = streamRedirect.GetErrorString();
@@ -815,9 +851,12 @@ debug csolution: no clayer matches type 'UnknownType'\n\
 debug csolution: clayer type 'DifferentFromDescriptionInPdsc' does not match type 'PdscType' in pack description\n\
 debug csolution: validating combined connections:\n\
   .*/TestLayers/genericlayers.cproject.yml\n\
-  .*/ARM/RteTest_DFP/0.2.0/Layers/board1.clayer.yml\n\
-  .*/ARM/RteTest_DFP/0.2.0/Layers/incompatible.clayer.yml\n\
-  .*/ARM/RteTest_DFP/0.2.0/Layers/pdsc-type-mismatch.clayer.yml\n\
+    \\(Project Connections\\)\n\
+  Board: .*/ARM/RteTest_DFP/0.2.0/Layers/board1.clayer.yml\n\
+    \\(Board1 Connections\\)\n\
+  Incompatible: .*/ARM/RteTest_DFP/0.2.0/Layers/incompatible.clayer.yml\n\
+    \\(Incompatible Connections\\)\n\
+  DifferentFromDescriptionInPdsc: .*/ARM/RteTest_DFP/0.2.0/Layers/pdsc-type-mismatch.clayer.yml\n\
 debug csolution: connections provided with multiple different values:\n\
   MultipleProvidedNonIdentical0\n\
   MultipleProvidedNonIdentical1\n\
@@ -829,9 +868,12 @@ debug csolution: sum of required values exceed provided:\n\
 debug csolution: connections are invalid\n\
 debug csolution: validating combined connections:\n\
   .*/TestLayers/genericlayers.cproject.yml\n\
-  .*/ARM/RteTest_DFP/0.2.0/Layers/board2.clayer.yml\n\
-  .*/ARM/RteTest_DFP/0.2.0/Layers/incompatible.clayer.yml\n\
-  .*/ARM/RteTest_DFP/0.2.0/Layers/pdsc-type-mismatch.clayer.yml\n\
+    \\(Project Connections\\)\n\
+  Board: .*/ARM/RteTest_DFP/0.2.0/Layers/board2.clayer.yml\n\
+    \\(Board2 Connections\\)\n\
+  Incompatible: .*/ARM/RteTest_DFP/0.2.0/Layers/incompatible.clayer.yml\n\
+    \\(Incompatible Connections\\)\n\
+  DifferentFromDescriptionInPdsc: .*/ARM/RteTest_DFP/0.2.0/Layers/pdsc-type-mismatch.clayer.yml\n\
 debug csolution: connections provided with multiple different values:\n\
   MultipleProvidedNonIdentical0\n\
   MultipleProvidedNonIdentical1\n\
@@ -843,9 +885,12 @@ debug csolution: sum of required values exceed provided:\n\
 debug csolution: connections are invalid\n\
 debug csolution: validating combined connections:\n\
   .*/TestLayers/genericlayers.cproject.yml\n\
-  .*/ARM/RteTest_DFP/0.2.0/Layers/board3.clayer.yml\n\
-  .*/ARM/RteTest_DFP/0.2.0/Layers/incompatible.clayer.yml\n\
-  .*/ARM/RteTest_DFP/0.2.0/Layers/pdsc-type-mismatch.clayer.yml\n\
+    \\(Project Connections\\)\n\
+  Board: .*/ARM/RteTest_DFP/0.2.0/Layers/board3.clayer.yml\n\
+    \\(Board3 Connections\\)\n\
+  Incompatible: .*/ARM/RteTest_DFP/0.2.0/Layers/incompatible.clayer.yml\n\
+    \\(Incompatible Connections\\)\n\
+  DifferentFromDescriptionInPdsc: .*/ARM/RteTest_DFP/0.2.0/Layers/pdsc-type-mismatch.clayer.yml\n\
 debug csolution: connections provided with multiple different values:\n\
   MultipleProvidedNonIdentical0\n\
   MultipleProvidedNonIdentical1\n\