If you are arriving via
DCL transfers, it doesn't matter what your PAT is. You will be allowed to enter the terminal when the bus gets there. Now, your boarding number is typically tied to the PAT you have, and you get the same boarding number whether you check in earlier than your PAT or later.
If your group has two (or more) boarding numbers, and you wish to board together, DCL asks that you all wait until the higher number is called for boarding.