currently i own a FIZIK Arione that i use on my cannondale. For some reason i dont know if it is to far back or too far foward, every time i pedal down with my right leg i feel a rocking back and forth of my um......man region, after a while i starts to go numb and gets irritated. I dont know if it is my leg length being to short or long or if my seat is too high. I have measured correctly and have the correct set up on my bike to where it is suppose to be but for some reason i still get a chaffing in that region. Any suggestions would be helpful