Tell me they're not... twin roos

Hey all... I got 4 *supposedly* pullets in early April. They're now all 15 weeks old. Two Ameraucanas and two Ameraucana/Cream Legbar mix. One of the Legbar mixes has OBVIOUSLY turned out to be a rooster, but he's beautiful, his name is Ariana and up until now I didn't have any roos so I figured I'd keep him. He's also pretty chill, for a rooster.

Now, the pair of 'twin' Ameraucanas (Falkor and Grey Duck) were born the same time as Ariana. They have beautiful feather patterns and longer tail feathers, but they hold their tails more down, like hens and they aren't growing combs like Ariana did. They're also significantly more docile and henlike. But now I'm paranoid and worried that they're roos! ACK! I just wanted some blue egg layers! Please tell me I don't have 3 roosters O.o Am I in denial? It's ok, tell me, I can take it...