I have the exact same problem. Very frustrating!
In the EFB, all the throttles are doing the correct thing. I have the Thrustmaster Airbus. I set Reverser on axis and 2-axis.
When I move Throttle 1 on my hardware, I see throttle 1+2 move in the EFB, but in the cockpit only throttle 1 moves. When I set full reverse thrust, I see it in the EFB, but on the Throttles in the cockit only the reverse levers are pulled but not reverse thrust applied (stuck in the idle position).
I deleted the ini file and stated again. When looking at the ini file, it doesn't mention at all that I use the 2-axis configuration.
£50 spent for nothing. Can't even do a basic flight...