If you don't have set correctly the auxMag orientation you should not fly...
Set orientation:
First set the Z value: 0 or 180 > look at bar with Z label, move board. Value stay to 0 ?
Second step : change the Yaw value, -90, 0, 90, 180 and check the X and Y bars and try until the value stay around 0.
This assume the onboard mag and auxmag alarms are green and your GPS/Auxmag not oriented randomly at 30° or something.