Really? I got disconnected from a game before that one but I thought enough time had passed already that I wouldn't be banned.
If I was banned for that one then how was I able to join another after it?
Do autobans take some time to be put into effect?

I've been having some weird problems with the autoban system too.
I was just banned after winning a civ wars game. It accused me of leaving when the game ended legitimately. I didn't even leave after we won, just waited for the end game screen to show up. What gives?