Ray - I finally pinpointed the problem after renaming the configuration folder.
After reinstalling the WA extensions DB, DE & MySQLi, then numerous DMXzone extensions, I found DMXzone's reCaptcha extension was the culprit.
Dreamweaver Insert, Update, Delete Record SBs were replaced with:
Dynamic Attribute(form action="<?php echo $editFormAction; ?>)
in the SB list
Uninstalled their reCaptcha extension and all was well! Reinstalled - problem returned. Tried this a few times.
So nothing to do with WebAssist!