Hey everyone, I signed up to this site to try and provide you with a possible solution to your ghost key presses with the X55 throttle.
I had the same issues and to resolve it I installed the USB3 drivers from my motherboard provider as well as a tweak in the PC bios. The thing I think fixed it was disabling Legacy USB Support in said bios. Since doing that all the issues have stopped and the unit has been pretty fantastic.
Hope this helps you as I couldn't find a solution online but hopefully this is a universal fix for everyone with the problem!