Yes, to get focus at 30 yards this scope's AO has to be set at 50, but to eliminate parralex at 30 yards, the AO scale has to be set on at least 100 yards.
The design of this scope is such that it needs a special spanner to loosen the front lens locking ring. And because the AO is ajustable, the lense may not be adjustable in it's housing like fixed AO scopes I've adjusted in the past. So, with this one, "100" is the new 30.
Since I don't use the AO scale for ranging, it's not important to me what the AO scale actually reads. Just mentioned it as part of what I'm finding out about this package gun. Now that I know I'll be keeping the gun and using it for hunting, I'm saving up to put better glass on it.
Paul.