Lopsided air cell?

[Babyquail]

Day 21, duckling is still moveing, (not as much as I want but still) but his air cell is lopsided, like it goes further up one side than the other in the egg, like its shifted. Is he gonna be ok? Probley worth mentioning that the other 4 eggs died a week ago.

 

[WIchickMama]

Do you any pics?

 

[Babyquail]

I looked again and there is a weird black blob in the top of the egg...... distinct veins and movent but still, is he ok?