When moving up the levels of TROM the distinctions between the basic 4 actions becomes finer and finer, resulting in the 16 levels at TROM 5.
It has become apparent to myself that Origin and Receipt referencing is a requirement when looking at the game levels as these are postulated by whom is starting the game. However the Overwhem levels are end-game scenarios, where one of the players finishes the game by having the other give up their own postulate and adopt the PD postulate of the other. In this situation the Origin / Receipt status is a moot point really - and if it is focused upon then all it really does is feed the Overt/Motivator justification pattern.
So, if O/R is considered in Leg 1 overwhelms (7A and 8B), then one would need to know which level 7B or 8A was the start-game, as we are now at an end game. Thus, for every Overt/Motivator there would be 2 possible starting conditions: 7B->7A, 8B->7A or 7B->8B, 8A->8B respectively.
If O/R is not a requirement, (and I suspect this is the case), then the idea of O/R is a moot point as stated and thus can be removed from the chart or referenced in another manner.
For myself the FLOW arrow on the revised chart simply allows one to see the flow of the postulate overwhelm, which is a totally different structure to the starting postulate of the Game states, which is who started this game.