Hi Troy,
I'm afraid this is just one of the weird things that eCart does now and again - removing code, causing errors in other areas of code. We had Ray / Jason resolve it for us because there was no rhyme nor reason to it but I couldn't honestly tell you what they did because it was way above our heads. It certainly wasn't anything we were doing wrong though - we were just making changes to the jQuery validation via the wizard and it would subsequently wreck other areas of our page.
Tread with care is all I can say and always make a copy of your page when it WAS working, prior to making any changes. It's not a great way to have to work but it's the only solution sometimes when using WebAssist extensions even if it is just to prove that you're not going mad!
Good luck.
NJ