What Exactly were you doing wrong. I have a buddy who is having this exact issue. But I can’t solve it from my end at the moment.
Nevermind…figured it out for him.
For some reason you have to make sure that Joystick is selected in the controller menu then you click advanced and map your Axis. If we did it when either throttle or pedals were selected the mappings in the advanced menu would be porked.