I did that too a few times and unfortunately, it was just due to stress and pressure due to time constraints. It's hard to remember what you did exactly and then to write about it you are going to forget something or put something in the note that you actually did not check. I'm hoping my score will be released on June 20th (the next reporting period) so we will see how it goes. I am worried about that too and I didn't realize it until later that I did that. It was totally by accident and I can't imagine anyone would purposely fake a note.
In my case, I think part of the reason that happened to me was that I kept practicing typing notes and the format for each system. I hope they don't fail me because, for example, I put sensation intact and I actually didn't do that. This only happened once and I think this was one of the biggest mistakes and I seriously hope I don't fail because of it. 🙁