Huh?
Priority doesn't mean first.
Zone 1 = First/Business class, *A G, CP, PP, GP
Zone 2 = *A S, SP, Signature
Zone 3-x = whatever based on the seating chart.
So yes Zone 2 is priority seating over general seating/boarding.
I /think/ exit seats are also priority seats. Not sure but I /think/ it is Zone 1 as well.