Lock the whole lot down, the chickens should be ok. 65% is good for my hatching, but dampen the duck eggs, not the chicken eggs, first. Then sit back and wait.
That egg is ready. It's bulging the air sac. Your other eggs will do just fine if you lockdown now, are you laying them all flat? Or in cartons? If I were you, put the eggs - chickens and ducks - into cartons, pointy end down, and put a book under one end of the bator. Put the humidity up. Put...