As the thread title implies, my new DFGT is about a few degrees off center, but that position shows up in all calibrations that it is the 'center' - anyone know the solution to this problem? Unplugging and replugging+recalibration doesn't work.

If the phisycal wheel is off center, and the in-game wheel is not (AND the car drives straight) I would suppose you have to unscrew somehow the wheel to correct this few angles. Don't know how, though...
Or return it to the shop.