I'm having the same problem. I was to allow access to a page if either the Customer ID Session Variable is >1 ( so basically if there is one) OR ir the admin level is greater than 2.
It allows access on the first one, but fails if the person's admin level is greater than 2, because it had already failed on the first one.
I cant figure out what to do in this case... I want both groups of users to be allowed access.