It's possible they are siblings? You can still breed them together. Just watch for odd traits. I had to do that for 8 years and only recently started having problems. I now have some new blood from the same line to help with the fertility and genetic issues.
Unfortunately, I've found that earlobes can change alot. I have some birds that show white in the earlobes until sexual maturity and then show red without any enamel white. I believe it is from the white skin causing the earlobes to appear white until they completely reach sexual maturity.
Of the chicks, grow out all the ones that do not appear to have any red on them(you may see a tinge of red on down feathers as chicks or brown color. I would either sell these immediately or just use them in a pet/food flock). Only the ones without red and the least amount of enamel white in their earlobes should be used. Usually, about 6+ months, you'll be able to tell if they have white in their earlobes.
You can breed the chicks together, or breed back to the mother. Since the father shows both faults of the white earlobes and red, I wouldn't breed back to him if you have chicks that are without the red leakage and white enamel as it will only set you back.
Wow, you are really helping me out. What other genetic issues should I be looking for? I know there are probably many and you have plenty to do aside from schooling me. I really wish that my roo didn't have the earlobe deal...I am really loving this breed. My hen is laying 6 days a week....it would be nice to have a good daddy to really get the most of those eggs. What do you think of him x RIR and Red Stars (Standards)? Will the eggs show a difference, if fertile and will the chicks become a medium bird with his nice looks and all the egg laying? Do you think I will have trouble selling any of the chicks?
I'm sooo excited....today is lockdown day for 5 of the 10 eggs!! Can't wait to see this process....it amazes me!!
Thank you so much for helping me. I will be following your advice.