I haven't really gone to the chat room, but I think it's separate from the forum? Like with different moderation and stuff? I think that's what was said the last time someone asked about the chat. The names in there aren't even the same, are they?
(Okay, I know this wasn't particularly helpful or anything, but I didn't want to read it and say nothing. I would have suggested PMing a mod, but if moderation of the chat is separate, I don't know if that would help or not.)
You certainly seem to me to be behaving more politely than most randomly banned people would.
Maybe somebody thought you were somebody else?