Hi Steve and welcome to the Community!
From what I can see by counting the opening and closing parentheses, the condition can be true when the OR part evaluates to true, even if [Possible PA] is not equal to 'PA'.
I would suggest breaking the condition into several parts evaluated in different columns to get better visibility into its logic.
Overall, it's usually a good idea to avoid complex expressions because they obscure calculation logic and decompose a complex expression into several simple ones.
Also note that you can use local constants to remove repeating parts of expressions and simplify them, for instance:
LET loc_for_rates = IN(AsText([LOC FOR RATES]), '110:320',':')
Local constants are explained here (see "The LET operator"): EasyMorph | Type system and expressions
Thank you for the clue. I was able to detect and fix the logic. Just needed that little extra help. I need to learn your debug tools better like the analyze pane and sandbox so I can debug better.