It sounds like its in the membrane, trouble is that its a small embryo that didnt grow right, or double yolk? not sure on that
I would keep it upright at hatch, thats all you can do.
I don't think it is a double yolk. I'll keep it upright and monitor it. Hopefully I can save it. It sucks knowing it's alive in there right now. I can't help but feel like I should've noticed earlier. Do my other aircells look good? I have some that are definitely developing the dip to one side.