I have received my sn-3 5-25 with milestone erek. The question I have is this: Since I have been fondling the knobs a lot I realized that if I dial in a lot of elevation and then back down, when I hit zero there is a click inside of the scope body, not the milestone knob clicks but as if the erector is clicking into place. This only happens when I dial in a lot and back down. If I do a small correction, like a few mils then it doesn't do this. I assume this is normal?