My memories of flying both in the front and back of the 332L are a a little dimmed by time now but I do seem to recall that some oil companies had a policy of restricting the number of pax on board.
I certainly remember that one company would not let pax sit in the middle seat of the back row - limiting the payload to 18 pax.
Perhaps this is the way for the more safety aware companies to go
! I know I always felt a little hemmed in if I was in the "wrong" seat in the back - though the seats were far chunkier and in a different configuration to that used now and the windows are now bigger especially on the 225.
HF