I agree with Arbor. One of the hens is bronze and one is split bronze or IB. If he told you it was bronze, I would leave it in there and see if you get some bronze babies to test it. You have nothing to lose. If you can get the possible split bird in the sun and get some close up head neck and chest pictures, I might be able to see if it is split. My split bronze girls are all much darker int the normal "cream" color areas and have lots of "rust" color in the head and chest.
You definitely have one pied and one silver pied as you suspect.
You definitely have one pied and one silver pied as you suspect.