I think what you have are second generation sex links. Unfortunately, sex linkage is a one time thing, so in the second generation you basically have mixed breed birds. They pullets will still be wonderful layers, you just can't sex them by color like you could the parents. Good news is, your birds are well old enough to sex.
pullet
pullet
pullet--probably. This is the only one I'm iffy on. The color says cockerel, but everything else looks female.
cockerel
cockerel
cockerel
pullet
cockerel
cockerel