I think I remember confirming that comp_mode is 0 when the robot is enabled. I don't remember whether I confirmed that it changes when the robot is disabled though.
BTW, the fact that your light turns off when the robot is disabled doesn't mean comp_mode changes. All it means is that the master microprocessor in the RC knows when it's supposed to disable the robot, and it does.
In any case, it would be nice if IFI would correct the comments in the default code regarding comp_mode.