any one ever have a problem with their scopes ,by this i mean,,when you try to raise the point of impact in the direction of the arrow ,it goes the opposite direction. i was sighting in a 22-250 with this scope on it it's a tasco 4x16x40 world class(what's on the box anyway) and i'd say about 50 yd's out. had the rifle in a vice and with the first bullet hole on paper i was trying to click the crosshair up from the bullseye to te bullet hole,but it was going down ,,so i had to click it down to make it go up..reckon' what the prob. was ,,,any ideas