Same problem here...
Having similar problems here with the latest version of Validation toolkit on ASP/ VB. When I go through the validation wizard, everything seems fine. When I go back in, everything is renamed forms[0].Field1.... all validations apply to the first field, even though they were connected to other fields. Everything is named after the first field.
I am a 6 year WebAssist extension user and I literally use your extensions everyday. The latest release of Validation toolkit for ASP/VB is messed up. If you say you have tested it and don't see a problem, you are not testing it thouroughly. Also, referring to forms without the proper form name is onbviously appropriate...but what will happen if a user adds/removes a form above the one with validation.