do you guys allow your waitresses to tip themselves? $2 was added to my bill and my boyfriends bill after we had signed the receipt and left.

No, this hasnt happen when I've been there.

Im btting it was a mistake .. they have been there forever it would be disappointing if someone was that dishonest

I don't think they do, I've been there loads of times and this hasn't ever happened to me. This one time though there was some mistake they made while adding the tip i had written, so i called in and they fixed it right away.