That's so awesome ! I'm still deciding whether to let my hen hatch my eggs or if I should leave them in the bator. I kinda wanna leave them so I can experience the miracle for the first time and keep a close eye but then I also want to make sure they hatch no matter which way it happens. I wanna give them the best chance. Why did your eggs have large air cells? Don't the hens make the perfect amount of humidity?
I would incubate the first time just for the experience. It makes you feel like the broody!
This can happen often when the air sac is big, up one side and the other. No room in there!
And yesterday was day 22 I think... So it came late. I was ready to throw them away and switch them out! Goes to show... Never give up on these little guys! They can surprise you every once in a while!