Day 21 duck egg air cell too small/wrong position?

[WhiteTreeOfGondor]

I'm not sure if these air cells on my 3 duck eggs are the right size for day 21, especially egg number 1. That one seems smaller than the other two, and the air cell is also directly at the bottom of the egg instead of tilted like usual. Will this be a problem? I've been trying to keep humidity between 55 and 60.
Should I lower it before lockdown? Thanks!

Egg #1:

Egg #2:

Egg #3:

 

[Yardmom]

I would personally lower the humidity (40ish) for a few days. The placement of the air cells looks fine. Not sure what causes the differences, but they happen. Good luck.

 

[WhiteTreeOfGondor]

I would personally lower the humidity (40ish) for a few days. The placement of the air cells looks fine. Not sure what causes the differences, but they happen. Good luck.

Okay, I will try that. Thank you!!