I have the Orion 2, F15 EX also. I'm not sure on DCS, but I know that recently my throttle, which was all set up and working fine stopped working correctly in IL2. I read some IL2 forum posts talking about 32 button X4 mode, calibrating the throttle etc. THe issue was resolved by calibrating the throttle in such a way that I did not activate any of the buttons at the beginning, or end of the AXIS. The sim app GUI sux for this, as it does not show you. I used a straight edge placed in a certain low spot on my finger lift kit ( that's another matter, I want more variable detents but cant find them ! ) Once I eliminated the part of the throttle in calibration that activated buttons on zero or 100 % end, it all worked again.