We assumed since they could be edited they wouldn't have to be identical, nor that an LOE needed to be provided. Fuck ><.Your details in your Express Entry profile when you received ITA should be identical to when you submit your PR application, (and if it isn't then you need to include LOE and supporting documents if required). If there are discrepancies between the two it may increase the time frame, but I don't think they will refuse it.
I'm curious, did you include a 'Letter of Explanation' advising them why you made those changes?
The application was originally made in early/mid 2020, but my partner hadn't fully submitted it. We spoke to a lawyer in December and she said "just submit it, then open up a new application in your partners name too" - so the application had old information anyway.