If is difficult to know when the PAX was sitting, as from my experience, there are no seats except for the pilot, and to add the other front seat is removed in the C206 and C182 to allow an additional parachustist and easier access out of the door. I should add that with the maximan number of parachutists you can be right up to the limits in terms of weight and balance. even when I wax examined in parachute dropping the examiner was in a seat, likewise it was the only flight examination where the examiner was not there for the landing!