Been watching since the start but this is my first comment.
I like both Amber and Anna. I disagree that Amber is childish as such. She's young, opinionated and a bit full of herself (she seems to value her own self worth which isn't a bad thing (I'm looking at YOU, Amy), plus she is naturally stunning, so it's not without merit, plus I think she prides herself on not being the typical airhead who falls for everything). So I think she's genuinely hurt by all this. She almost predicted this with her initial assessment of Michael, but he won her over because she genuinely believed he appreciated her dry personality.
Anna recoupling was nowhere near in the same league. And we saw every one of the girls faces at the fire pit. They were all shocked and angry because they all believed Michael really had feelings for Amber. And Curtis for Amy. I don't believe Anna said anything the rest weren't thinking. PP were right in that he didn't in any way apologise, but blamed Amber for something he had hardly mentioned in the past.
Curtis absolutely tried to jump ship because he was shocked at not being in the top 3 and he assumed (not entirely correctly) that Amy was the issue. He thinks the public see her like they did Olivia 2 years ago.
I don't think Anna will go back to Jordan. In a public vote the bottom 3 couples would be Danny and Jordan, Amy and Curtis and Michael and Joanna.