why are you changing your transmitter from 50/50 to 70/30? That does nothing to the programing of the ESC. Pick which trigger position feels best to you, and leave it there (either 50/50 or 70/30) Then you have to re-calibrate the ESC to the throttle positions (see the manual). Then you can change it from training to sport or to racing or where ever you please (again, see manual). I think what's messing you up is you're changing the trigger position, that isn't necessary to program the ESC....