Did boss arena, got banned for hacking...?

It might be unrelated. Auto-Bans are normally instant

I dunno about that. I sometimes got the opposite impression. I'd start to experience bad lag while training, retreat to a town or rest map, then get banned. It would make sense to build in a delay for the banhammer to make it more difficult for hackers to know what exactly the trigger was.

Anyway, congratulations to Lance for telling them off and getting unbanned.