Some Ameraucana are born clean faced, which is not a desirable trait. It would make sense that some EEs would be as well. Your hens are adorable but not true Ameraucanas, rather Easter Eggers. Enjoy them!
Go look at all the colors. Sometimes EEs have green or slate legs, or even other colors. Ameraucanas should have slate or white or (I think black is acceptable for black)
Hatcherys confuse people by selling the mixed breeds as Ameraucanas which is misleading. I have both EEs and Ameraucanas. I love them both, but there is no breed standard for EEs. They have wonderful gorgeous colors that many folks love, including me.