EE is such a loose term... it basically means a non standard Ameraucana... a bird with a pea comb, beard and muffs, and blue/green eggs, but not in keeping with the "correct" feather color, leg color, egg color, or overall shape. Some older hatcheries were breeding and selling these birds under names like Americana, Easter Egger, Rainbow Egger, long before the Ameraucana became an official breed in the Standard of Perfection. These hatchery birds are a specific type, if not actually an official breed. Ameraucana breeders were anxious to differentiate their carefully bred show birds (with only 8 specific colors) from the random, but equally attractive (in my opinion) birds that come from the hatcheries. They used "EE" for any similar chicken that did not meet the Ameraucana breed standard. And more recently EE is applied to crosses between Ameraucanas and other breeds, but I think these should be called crosses rather than EEs.
I don't know if My Pet Chicken breeds their own birds or gets them from other sources, but neither of your EEs have pea combs from what I can see. Pea comb is important because in EEs, the gene for blue egg shells is very close to the gene for pea combs, so the traits are usually inherited together. Even if these chicks hatched from blue/green eggs, they are probably not carrying the gene for blue shells. $50 is pricey. Maybe you can ask for a partial refund?
I still want to see pics when they are a little older. The dark one is very cute.