If you got them directly from the hatchery, you probably received the right chicks. Hatcheries are usually pretty good about that.
A chick's first feathers can come in with all sorts of colors and patterns, but they usually look more the way you'd expect by the time they finish growing.
I think they're probably Golden Comets, but I cannot be positive. As they grow up, either they will look more like the rest, or the differences will become more pronounced. (Depending on whether they are the same or a different kind.)
Golden Comets are one kind of sexlink.
Some sexlink pullets...