Remember the photo we saw last week of Smith being "killed" by the cop? Shows do this all the time, especially in promos. In the promo this week, we see someone crashing through the glass and it looks like McAllister when we see the stills. Either it is McAllister and they want us to think we guessed "oh that must be RJ" because he's in the promo as a rouse.

It could also be that they thought that even if we captured a still, we wouldn't be able to tell it's McAllister because his head is down.

If it is McAllister in the still, it only means he is not dead and that he MIGHT be RJ. It could also mean that he is alive and someone else from the house is also alive and either he or that other guy is RJ.

Bertram is on the run because he was found out, not because he is RJ. Would RJ sneak in and kill PJ while he's unconscious? No way. We know for certain that RJ is not Smith or Bertram. That means if the list of 7 is true, it has to be one of the dead people.