@Texas Kiki
When should I stop turning the eggs? Some people say day 18, but some say day 14. Will it be fine to stop turning them when the older ones start to hatch?
Day 18.
I'm going to disagree. Surprise, you get a different opinion on something on this forum.
When a poultry science professor that specializes in chicken reproduction and who is also a consultant to commercial chicken industry gave a talk to a group of backyard chicken owners this question came up. His response was that turning is very important early in incubation for different reasons. But for chicken eggs those reasons went away at 14 days. It does not hurt to turn the eggs after that but it is no longer necessary. That's what I'm basing my comment on.
In a regular incubation keep turning them until 18 days. It does not hurt and there are no benefits to stopping earlier. But yours is not a regular incubation, it is a staggered hatch. I don't know how you are turning them or what you are doing with humidity but since you don't have to turn them after 14 days I'd factor that in to my plans. Keep it as simple as possible.