Here's some chick pics and footage.
I know Henna is a truly pathetic sight, but she's looking good now. I didn't feel that I should leave her in the incubator because she was crashing around into the other eggs and her yolk sac wasn't entirely absorbed and was scraping against the wire floor. So I made sure the brooder box was as warm as the incubator but softer and moved her over.
I didn't want Chicka stomping or pecking her so I separated them and they were clearly talking to each other. They are together now, all snuggled up and friendly and Henna is fluffing up and her yolk sac is almost all absorbed.
I think my incubator is a degree or two too warm, which would explain the early hatchers. I think my previous two attempts it was slightly too low because the first thermometer I had seems a few degrees off on the low side.
Next time I'll get it right.