So... I entered a Free Roam session this morning and I got the acheivement "Have Posse, Will Travel", the one where you beat all the CO-OP missions. But, I still have one left to beat. What happened...? Is there something wrong with my account now? Some little kids in my session were talking about all the glitches and hacks they know. Is something going to happen to my stuff now? Any one have any idea what's going on?