They can be early, especially if temperature were too high. However, if you don’t see internal pips in the other eggs then that’s probably not the case. When you candle, do you still see movement in this embryo? Are you planning to hatch on their sides or large end up? If you are hatching on their sides, then you can position this egg so that you can see the bruised area, in case it is pipping there. Other than keep a closer eye on this guy at lockdown, I don’t think that there is a lot that you can do at this point...
It was still moving, slowly. But then again all the ones that far along move a lot slower/less than the younger ones. Less room to move? Of course it is also a lot harder to see inside the egg now. I dunno. I am planning on hatching vertically. I know that in the wild, eggs hatch more horizontal than vertical, but it just makes logical sense to me. They were incubated vertically, and so it would seem that they would hatch better in that format since their spacial awareness developed in that manner. I'm just guessing Its all just a guess. Perhaps, if this one is malpositioned( if it is confirmed by someone here later), I might hatch this one on its side. But, I'll have to figure some way to support that area upward.