after you have things sorted with your throttle behaviour I suggest you follow the lost your binds?
guide stickied to the top of this pc subforum on why they can become corrupted and what you can do to back up and prevent it
once a throttle axsis is bound weather reg or inverted only that(full range or forward only) and the increments settings ie continuous etc should effect the throttle behaviour so try different combos to get it back how it was so once out of a station and in space play around for cause and effect and what suits you sir!