[XFMG 2.2] Media Gallery appearing as the wrong user

This is an odd one. I have the Gallery available only to staff, so it is not publicly viewable. What happens is, if I click on Gallery, my style changes, and my user menu at the top of the forum changes to the name of another administrator on our forum. If I click on his username, though, my user menu shows up...so I am not logged into his account.

We only found this out since he was attempting to upload images yesterday, and he could not find them after they were posted. I...