Try redoing the parameter reset, following the manual (pages 26-27). I suspect this important step was missed:
Rotate the steering wheel full right then full left; then move the throttle trigger to full throttle and full brake. Note: The values will change to correlate with the actual potentiometers.
After the steering and throttle/brakes have been transitioned throughout their stroke, use the roller to highlight SAVE and press the roller to save the calibration settings.