to be honest, these issues are caused by modifications you are making to the files.
the issue with the accordion is happening because the reference to the acordian.js file is missing.
On the webassist/plugins/sidemenu/accordion/sidemenu.php file, there should be the folloing code just after the head tag:
<script src="js/accordion.js" type="text/javascript"></script>
on the webassist/plugins/sidemenu/nested_accordion/sidemenu.php file, there should be the following:
<script type="text/javascript" src="../accordion/js/accordion.js"></script>
the issue with the detail page is that the ProductPrice div is missing from the detail page.
