Today I was cleaning the scam messages off of the wall of one of my old groups. Since the wall hadn’t been cleaned in a while and had accumulated several pages of scams, I was spam clicking the Delete button. Turns out when you spam the Delete button, this happens:
Each click would add an extra (1), and all of the extra (1)s would disappear about a second after I stopped spam clicking. This worked with every group rank, and somewhat worked with the Exile User button too. This bug did not seem to affect the performance of the page at all, so I would rank it as a low priority for fixing.