I don't know about doing anything whilst asleep but I am aware of those who find themselves typing whilst in a less-than-fully-conscious state..... of course, it all just comes out as gobble-de-gook!!!
It could be any number of things, perhaps a trapped nerve. Chances are its nothing to be alarmed about but I am not medically qualified so I wouldn't dream of offering advice, other than to suggest you see your doctor, of course.
RE: Have you been banned from CS?
Nope...... NEVER!!!