There is a lot of opportunity for errors by the time the info gets down to us! LOL! Actually, I don't know how some of those people were able to transcribe the census records and get any of them right! Some of the writing was awful, and I am sure there were mistakes at the source as well. I guess the best we can expect to do with some of this is get it "sort of" right! :)
Good luck to you in your search!