I went back and read the breed thread discussing your girls, I see why you are so confused! I would be too! Yes orpingtons can have dark shanks/legs, my All of mine that have the black or blue gene in some shape form or fashion have (blacks, blues, splash and lavenders) have dark legs. My lavenders orpingtons sometimes have yellow beaks with black when they are young. My buff's have light colored beaks/shanks/legs.I might be completely wrong, but my first impression on theses two are Splash Orpingtons, color, shape build, legs, heads, feathering ....They don't resemble easter eggers to me. They look young, 16-20 weeks maybe? I have a yard full of Orpingtons, Splash, Blue, Black, Buff and Lavender as well as EE....There is definitely a big difference in my opinion. But my ideal EE (AKA Americana) look like eagles or a cross between Ameraucana's and Araucana's with beareds, or tuff's or muff's ect.
Again this is an opinion, I love the EE personally, but I do not see that in these two!
I do agree yours could have lavender and breeding them back to a black may resolve some color clarification. You could wind up with a Blue/Black/Splash or Lavender chick!