Agreed, the sex linking in golden comets and other red sex links, only occurs in the first generation. It cannot happen in any following generation. And you have to have the proper 'recipe' to have it work.
Then, unless she lays anything other than true blue, I'd say she's an ameraucana, or mostly ameraucana. I'd bet money that she lays a green egg, however.
I hate to say, but I think they're all cockerels. Even the second one. I don't see male saddle feathers there yet, but I still think its male.
ETA..... hmm.... I'm thinking myself out of it.... could be a pullet. But I'd expect that comb to flop soon.