Yes, just one incubator. It's cabinet style, with an egg turner and separate hatching tray. I left them in the egg turner overnight and one hatched. Another one was pipping down into the egg, and drown.
So I just moved all the eggs to the hatching tray, and within a half hour another hatched.
This is only day 15, so I am still surprised with all of this!
I remember reading somewhere that if the temps are too warm they can hatch early. Likewise if the temps are just a little too cool they can hatch later. 21 days is optimal. You may have preemies...if there is such a thing in chickens?
I would love to see some pictures!