I am not with Laminar Research; just a flight simmer.
Firstly you may have a conflict between the windows configuration and X-Plane config for the throttle. I would suggest you delete the windows config and concentrate on X-Plane only.
Secondly there was a problem with the throttle control where the settings had to be reversed. I understand that problem may have been fixed with a later version (11.20???).
Thirdly make sure you are running the latest version of X-Plane. I understand there is or will be a 11.30 released for trying. If you happen to be running a steam version any updates will always be behind the official version release from Laminar Research. They are not the same product.