Your confusion makes me even more confused.
My understanding is that the entire group just entered the housing area (think more highrise apartment rather than houses)
The team split into two groups: (Shannon and Julie) and (Catherine, Edward and Tommy) and were starting to walk away from each other. A bus pulled up, a half dozen very tired working age people step out and the three identical teens.
Catherine spooks at that and drags the rest of her group to one of the apartments and tries to bang on the door to get in. A small girl, clearly expecting someone else, opens the door, realizes that she was wrong and slams it back in Catherine's face. The three identical teens (quite possibly AJ, BJ and CJ) are coming up to that same door.
Clear as mud?
Back in Remember When, waiting for Pat to put in a pose while Lilith is walking away.