I bought one of these Vortex scopes when they were on sale for $99. I like the scope and was suprised with the clarity of the optics. The only issue is the scope adjustment is backwards from all my other scopes. What is up on my other scopes is down with the Vortex, etc. Is this normal for this scope? Anyone have this scope and noted the same thing or did I just get one that was built wrong?