are the others on WEP and you on Militarypower?
are you using a Throttle ( ie...CH Pro Throttle or Sateik Throttle, etc...) ? or just using the keyboard?
a tip, if you are using a Throttle Device, while calibrating, try to leave just a notch or two short of being Wide Open & short of being no throttle..... this will cure any spiking you have at each end of movement for the throttle axis in question.....
hope this helps