The way I read it for calibration is that 100% throttle (peddle to the metal) the controller is looking at the maximum throttle voltage reading. And setting that reading which is given, at a percentage of 5 vdc supply voltage as the Max Throttle Percentage.
So at throttle minimum it must be reading 0 vdc = 0 % Controller makes this off. And at full it must be reading 3.65vdc = 69% Controller makes this full on.
Back probe your throttle output to verify... What throttle are you using?
Regards,
T.C.