i recently added a motorized 31 inch ku dish to my dish collection and am hitting from 72 deg to 129 and noticed something, on t6 dr gene scott tp at times i get 99 pct quality and at others as low as 58 pct. even going east and west doesnt help any. is it normal for some channels or tps to lose quality and gain it back? all in all i am very happy with the motor,except it doesnt always hit the right spots, sometimes i have to bump east a notch or west a notch and then store location.