Well, they really only guarantee something like 90% accuracy in each order, I think. Sexing is an art, after all. So, looks like that held up in your case, unfortunately, LOL.
Wyandottes have a rose comb unless one pops up with a single comb,as they do from time to time-comes from the Cochin ancestry.
The one you're worrying about IS a cockerel. Wyandotte pullets don't redden in the comb or really get wattles for over three months. The Buff Orp is a cockerel, but you...