Voodoo,

The issue you are having is becuase of the windage limiter there should be some instructions with the scope that will tell you how to handle this. Basically there is a tit on the windage knob that only allows for 1/2 a turn for windage if you cant zero it you need to remove the windage knob and reset it so you get the adjustment you need to zero. Once you have a good no wind zero the limiter saves you from being a revolution off and you shouldn't really need to dial in more then 4 moa.

Monty