Well i've encountered some issues with my CH Combatstick, it's hard to describe it in english for me, but it's like a "shaking" stick. When i move the stick straight in a direction (not quickly most of the time), the sensors detect some shaking movement ...
And sometime, when i flight in a straight line, well trimmed, the sensors detect a left rolling input but the stick is centered.
A video of the CH Control Manager: