Additional intro text for Silver contribution to Challenge #1; a coup…

…le coding fixes.

conformance-challenges/index.html

@@ -244,6 +244,7 @@ <h2>Challenge #1: Scaling Conformance Verification</h2>
 
 	<div class="silver">
 		    <h3>Silver Research Findings</h3>
+		    <p>Silver research identified two further challenges related to scaling conformance verification:</p>
 
 		    <ul>
 			    <li>
@@ -264,7 +265,7 @@ <h3>Silver Research Findings</h3>
 
 	    <div class="mitigation">
 		    <h3>Mitigations</h3>
-		    <p>>There are a number of approaches for mitigating scaling
+		    <p>There are a number of approaches for mitigating scaling
 challenges.  For example, if pages can be built using a small number of page
 templates that are fully vetted for conformance to criteria relating to
 structure, heading use, and layout, then pages generated with those templates
@@ -400,16 +401,18 @@ <h3>Mitigations</h3>
 	<div class="silver">
         <section id="Challenge-5">
 		<h2>Challenge #5: The <q>Accessibility Supported</q> Concept</h2>
+		    <h3>Silver Research Findings</h3>
+
 	<p>Accessibility Supported is a conformance requirement of WCAG 2 that is
 poorly understood and incompletely implemented, i.e. the role of AT in
 assessing conformance.</p>
 	</section>
 	</div>
 
-
 	<div class="silver">
         <section id="Challenge-6">
             <h2>Challenge #6: Version Compatibility</h2>
+		    <h3>Silver Research Findings</h3>
 
 	    <p>Evolving Technology of the rapidly changing web must constantly be evaluated
 	      against the capabilities of assistive technology and evolving assistive