Hi, I have only just upgraded to the 360, and got forza 2, and have been playing it online, but the other night I noticed one of the cars jumped back to the middle of the track every time it went off, and I noticed the same guy doing it again another night, was this a glitch in the online play, or was he cheating?

Most likely just lag from the traffic online. Were you playing at a peak hour of internet usage? I had played NFS (I forget which one) online and noticed the same type of thing. It got really annoying so I stopped. I'd like to go back and try it again just so I can get the rest of the achievements. So, if it isn't lag, there is a possibility of cheating but I haven't played enough online yet to give you a good diagnosis.