I got your answer

I have the CH Pro Throttle & Pedals, plus the CH Fighterstick, and I have had the exact same problem.
Remember that your Fighterstick has a throttle wheel on the stick itself that you don't actually use. This is whats causing the problem. Its slighlty uncalibrated, even though with your setup, you don't calibrate this control device.
What I usually do is move the throttle wheel all the way to the opposite stop (or also move it all the way back then) and it will usually stop the problem.
If that fails, recalibrate in Windows and then again in AH.
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Vermillion
**MOL**, Men of Leisure