Is Co-Op Kill?

I was going to hop in this morning to do my three turns in the barrel but I can't seem to find it? Not on the Notifications board, not on the upper left swipey-swipey thing. Did I get banned for being stupid (I swear it was never on purpose; I always try my best for a high score when playing Challenge and let the AI autoplay me to the appropriate score on Normal mode) or did SU just yoink it because of bugs?