On the auction BCM eggs I hatched out a feather legged brown EE. Bought the eggs @ Blanchard sale. Who ever is selling the eggs doesn't keep there hens separated from other Roos IMO. Not thrilled when you consider the price of deep dark BCM eggs.
WOW, that would tick me off too. Those little darlings don't sell cheap and to then get a 'mutt' hatch would send me over the edge. That is why all our hatching eggs come from mating groups that are in their own coops and runs. Hopefully your feather leg EE's will be pullets that will lay nice olive eggs at least.