X2.I don't think your first 2 chicks are EE, they look more like partridge Rocks, something like that.
The barred birds--yellow legs and straight comb=Rock. white/pink legs and straight comb=Marans yellow legs and rose comb=Dominique
The birds you're calling red leghorns--I'm not seeing that breed at Cackle? I'd also expect anything Leghorn to have more comb at this stage. They could be Welsummers, or pretty much anything partridge based, from what I can see.
Red leghorns are pretty rare and I don't know of any hatchery who carries them.