The template created by CSS Sculptor should have created the correct template. There is probably some better advice from one of the WA Guys.
But if you want to test to see if the template is causing the problem without altering the original template, then back up the page you are having a problem with (in case you need to revert to it later on), and with your 'problem page' open, from the Dreamweaver menu select:
Modify > Templates > 'Detach from Template'
This will allow editing on the page. Try your repeat region now, and see if it works.