I have some questions I hope to have addressed. Please be patient in your replies. No flaming please.
I just read an article on breeding head colors. This occurs after I had bought a new pair and bred them

I put their breeding issues down to being inexperienced. I would like advice as to how to handle them next year.
I have a bh/wc/gb hen and a rh/pc/gb cock. They only hatched out 3 of one clutch and a singleton of another. They didn't hatch any out of their first try. Should I get them new mates for next year?
Also I have a rh/pc/gb hen mates to a yh/wc/yb Vick.
They are awesome parents. They had a clutch of 7 this year and hatched all. This was their second year to breed.
Of the babies I have 3 gb/pc/yh males
3 yb/pc/yh females and a yb/wc/yh I don't know sex of that one. It is hard to tell with the white chests. The yellow underbelly does appear more vibrant.
Since all are yellow (orange headed) how does the parents generic make up account for that. It is so very confusing!
Thank you