The twins sure are playing better. Good to see. That was hilarious at the end when they swam instead of just walking across the shallow part. Even Phil couldn't help but tease them. I think that's their main problem - they don't look before leaping. They need to calm down a little when they reach new territory. Take a breath and take in the surroundings to improve their observational skills. I hope they go far.
About their feelings for Chip, I still think they are misjudging him and taking things much too personally. My perception of Chip is he's just being competitive and that he regards them as close competitors. I don't think he harbors any personal animosity towards them.