Independent engine control problems

[sschw56]

Hi everyone, I don't know if the following is a bug or realistic:
I have the Airbus Quadrant from Thrustmaster with two engine throttles. I can control both enginges independently.
When I turn on Autothrottle, only the thruttle 1 controls both engines. So I can do whatever I want to do with lever 2, both engines reacts on the input of throttle 1.
But the white ball in the ECAM and the mode in the top right of the ECAM and the status messages are reacting on the input of throttle 2, but not the engine itself.

Do you understand my problem or should I take a video?

Good evening
sschw56