I'm on day 10 with my eggs and just finished candling for the second time. I threw out two. One looks like an early quitter, the other looks to recently have died. Most of my eggs are polish, and I am loving candling all these white eggs! They are soo easy to see! All 22 of the shipped eggs are alive and well!! Started with 40 in the bator. Threw out the two tonight plus 1 on day 7. I hope things keep going smoothly with this hatch! Got 24 eggs in the mail today and they are a mess! 3 were cracked and every single air cell is a hot mess!
Good luck. I'm going through something a bit similar with my shipped eggs. They were intact, but I can't tell if they're developing--dark eggs--and they all have bad air cells except for one (saddle-shaped, etc.) Sounds like your Polish are doing well though!