BB7 Pregaming

Who pregamed together and how did it affect the game? I'm watching for the first time rn and I'm on week 3. Ik the winner and pre-jury boot order, and I don't understand why s6 (Kaysar as HOH in week 2 and James HOH in week 3) wouldn't target Chilltown who would definitely supposedly come after them.

Also I love BB5 and Nakomis and Diane are arguably my favorite players of all time, so watching how BB5 is fairing in all stars is so disheartening. They got dealt such a bad hand and I don't even think they're getting outplayed, it just seems that BB5 is getting screwed by s6's fear of taking a shot at Chilltown and poor strategy.