interesting motor rotation issue

[dodgydiy]

put a speed passion gt2 and speed passion motor in one of my cars tonight and have a fun little issue. if the sensor lead is plugged in the motor runs clockwise, not normal!! unplug the sensor lead and the motor runs anticlockwise, normal. have tried different sensor leads, same thing is happening.

have tried reversing tx channel and resetting speedo, no help
no provision for reversing found in the speedo settings
motor wires in correct order ie a-a, b-b, c-c
have checked all other throttle related tx settings
tried sensor leads on another car and they worked fine.

only other symptom is when sensor lead is plugged in, motor speed dips slightly at full throttle, which it doesnt do running sensorless.

What am i missing???? is it a dead sensor? only thing i havent tried is another motor and to be honest, cant be bothered, will run it sensorless like most of my other cars are , just interested as to what is going on!!