It just occurred to me this morning when looking at the 10 chicks I have (in the guest bathroom, argh), that based on comb cover one of the chicks I had assumed is male and just a slower developer than the others that had white spots on their heads, instead is probably a BR female. If that's true, then the TS I got them at really mixed up anything and everything! The difference in comb color is very pronounced, and the barring on the small yellow combed one is more like a BR than the others.
I guess if I just wait and see, eventually it will be clear.