Hi Monty
For para 2.2 observe the wording occupying a pilots seat...the same goes for relief pilots.
I may be wrong but the way I read it, it would mean that you can log the time that you are in the pilots seat only ( "stick time as PF or PM) , not the time spent in the bunk or rest seat.
Augmented crew would log their time in the seat as normal co-pilots. So if you have 2 co-pilots the two co-pilots log the time that they are in their seat. If you have a second comander he can log PiC time for his time in seat. The flight PiC (mission commander, or what you want to call it) can log the entire flight time irrespective of seat time.
Again I might be reading this wrong..
Brgds