Just putting some caps together to try to get a sense of the story ...We know that Day One is the storm, and the RC is probably the day after when they are miserable and cold, and dressed in warmest clothes. During that period, Christina and Monica beg for embers.
Here they are at the RC:
It might be afterwards when Alicia says that the guys' "deals" are not fair, because Jonas has on his long sleeved shirt, and Alicia is wearing the same brown top.
Alicia (talking to men's tribe): I just don't think your deals are fair.
When Jonas is holding the reward basket, it's not right after the RC, it's before or after the IC, per the clothing:
So, the men lose IC, why are Troy and Bill looking happy? Before IC maybe?
They are going to get soaking wet in the challenge and covered with the paint water, so maybe it's before.
We also see shots of the men in the sun with no shirts, and we see laundry around the camp. Maybe the shirtless scenes are post IC when they've taken off the soaked clothing?
Colton not shirtless but not wearing his green shirt that we see.
Here the frat boys are pensive and look kind of down -- no shirts.