4-pattern reticle selection imprecise and affects zero - Sightmark Ultra Shot Plus 1x 4-Pattern MOA Reticle Red Dot Sight

I purchased this sight for my AR-15. Construction and fit are great. Sight did not lose my zero after several hundred rounds with a caveat. My issue is with the reticle selector. The sight provides four reticles to choose from and a selector lever on the back of the sight allows you to slide it left and right to select the reticle. I zeroed the sight at 25 yards with the lever slid all the way to the left. It zeroed quickly and allowed accurate hits. But when I changed to a different reticle, I no longer was zeroed. The reticle selection is not precise. The lever does not "click" into a precise location and therefore the selected reticle can be moved left and right within your field of vision. Using a different reticle put my rounds off 4 inches at 25 yards. Once I realized the issue, I moved the lever all the way left and again was hitting accurately per my zero. This means to me that I cannot change reticles without re-zeroing my weapon to that reticle. I will leave the lever all the way to the left to avoid losing my zero. As ranges increase, the 4 inch offset multiples quickly. This is a very poor design and one that can cause a shooter to be well off target if they are unaware of the reticle slop.