Guys, I think this is the most logical U-TURN explanation i can think of, YET.
See the U-TURN (1) and U-TURN (2) and then another COURTESY OF (2) on the photo above?
So this means ->
U-TURN (1) is a BLIND U-TURN, don't need to put up COURTESY OF photo
Jill and Thomas U-TURN Brooke and Claire
Then Nick and Vicki arrived, with Brooke and Claire's photo on and decided to U-TURN (Chad and Stephanie?), but as the second U-TURN is a NORMAL U-TURN, they have to put their photo up.
Hmm, don't know if i'm right.