While shooting at the range this morning, I had a discrepancy between my focus and my parallax. When I change ranges I always readjust the parallax. This normally adjusts the focus. I adjust the parallax by moving my head and adjusting until the target doesn't move. This was not so today. The target was blurry. When I focused, the target would move with head movement. Is this normal,its not normal for me. The scope is an SS 12X42 rear adjust. I have some of all powers in this line, but I didn't have another one with me to cross check. The problem was at one and two hundred yards. Just need some input before I call customer service. Could eye glasses have something to do with it? They haven't changed.