Sorry if this seems over the top, just find it all interesting i still take it all with a pinch of salt.
JJ initially latched onto Josie as he immediately saw she would be a danger as an enemy(bad idea) , as a result he weakened her. Shabby messed keevas head up again playing on her affections/mind similar to what JJ did with josie.
Keeley had a good attempt at messing up steves head, steve was too wise for this though.
Keeva messed up josies head by flirting with JJ.
Josie messed up keevas head making her out to be a bitch and turning the whole house against her. Ben messed up josie head by smearing JJ in various ways(particularly in the bedroom). Ben is now working on messing up andrew, mario and rachel (i think rachel is genuinely distressed about it all).
JJ and keeva are constantly messing up josies head with their pally pally behavior.
Bens working on all the weak ones in the house, andrew, mario, rachel, keeley and partially josie to form his group.
It could be argued that JJ is consistently coming out on top and ben is the master manipulator of the house.
This is real lord of the flies territory now.