Hi,
I see the same thing, and can explain why in my case. Below is a copy/paste of a thread on the A2A forums where I reported this:
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I have my TQ6+ configured with normal Asobo bindings for throttle, power, and mixture. I use this config for all planes. Consequently, and to support turboprops, I make use of the Neutral point on the response curve. What this means for Turboprops is that anywhere lower than that is reverse thrust, so I don't need to use a button to go into beta then reverse, just pull the lever past the idle point. The TQ6+ has an idle point, denoted by a ball bearing that is supposed to represent a gate.
So to configure this I put the physical lever on the idle point, then on the sensitivities screen I adjust the Neutral point so that the white dot right is right on centre horizontal line. Bottom left up to that point is forward thrust, that point up to the top right is reverse thrust.
With that manic rambling out of the way, what this means is that for piston aircraft I am sacrificing a small range of the overall axis, and that 100 - 0 now only has roughly 70-80% of the axis to actually use. It's not an issue, just how it works, and it works fine for all other pistons, and turboprops.
Except this one. 🙂
When I move the lever down through the gate into reverse, on every other piston plane, nothing happens.
With this one, it actually goes to full power! It's like the axis is mirrored.
I don't know the numbers exactly, but its like 100-30 should be full power to idle, and 29-0 should still be idle, and do nothing, but instead goes from idle to full power again.
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Have a look where your neutral point is set. If you aren't flying turboprops this won't need to be set somewhere on your axis. For me its setup somewhere around -61 I think.