Katie H actually looked like she was crapping herself. She probably saw her and Perez as the final two. She now probably thinks she has a chance of being first out on Friday as Perez's game plan didn't work and hers might not either.
As for Keith, his problem was Cami not having her moment with the crowd, whether that be cheers or boos. Instead she was just dragged out of the back door in her scruffs. So I don't think he was being a hypocrite.
And it was good to see them actually celebrate a housemate they don't like leaving, rather than the usual faking being upset. If I was in there, I'd be dancing around that he had gone too.