I'm going from memory too, but I believe the Bogie/Erika and Will/Janelle hook-ups did NOT occur that late in the game. Erika and Janelle (the rocket scientists they are) realized Will/Bogie's power much later in the game as you stated. So yes, the FOUR of them became TWO separate aliiances late in the game, but the FOUR of them were tight for a majority of the season...and STILL emerged as the F4.

As much as I'll give WIll his due as one of the best BB players...sorry but no way he's a double winner if he flies solo. Far too powerful of a player to pull it off. The only way a Reality Show contestant can pull that off is to be pathetically inept and suck so bad the other players will NEVER see them as threats and punch their golden ticket to the F4. Once there the more solid and powerful players do not believe the jurors would reward such ineptness...that is unless you have bitter and sore-losing cry-babies on the Jury (just like guess who.)