Recently, while flying my aircraft, they all seem to be turning to the right all the time.
It's not the rudder, wind/weather or gyro drift, and it is fine when I set the heading bug on autopilot.
I thought I had fixed it, but I have not, it is still happening. I re-calibrated my joystick and changed it's USB port, but there is no change.
So I am wondering, does it have anything to do with thisNAV/GPS thing:

What setting should it be on and does it really matter? The screenies above are from a C206, but I get the problems in default cessnas too.
PLEASE HELP!
Chief Captain