[Greg McKaskle]

One of the dirty little secrets for HID joysticks is that they autocenter when the connection is made. Depending on the situation, that could be shortly after they are plugged in, it could be when the program is started, it could be when F1 is pressed.

Anyway, you will leave the joystick with a bias if you have it off center in these situations. This seems easier to do with gamepads than big joysticks.

Does that possibly explain your symptoms?

Greg McKaskle