I'm an admin on a forum. Last night we had one user post under another user's (an admin no less) username. Very quickly the post disappeared but not before we had noticed. The poster then said they had had error messages etc and then connection issues when other users also realised the post was written by the 'wrong' user. We believe that the admin's account was hacked somehow by the user but we would like to rule out a technical glitch. Is it possible that a technical glitch could have resulted in one user's post appearing as though another user had typed it? Is there any way at all that this could have happened? We think it's a long shot but would like to be sure.