When I'm in Naza Assistant on the VIEW tab and watching my Channel Monitor, my right controller stick does not always center on zero. I move the right stick to the bottom right and let go of the stick and my numbers are A=10 E=-4 If I do it again the numbers fluctuate by +-3to6 but hardly ever go to zero. Even after a calibration and I center my sticks, my numbers are always in the same area. They never go greater that +10 or -10 when I snap the sticks to center. Is this normal? My TX is a Futaba T8J.