I believe you, sometimes they do take sudden turns, very odd!
I can see a couple veins clearly too.
When candling, its best to candle from the air cell, btw. It will be somewhat clearer.
Could you candle egg 1 from the air cell? and get a photo? Just be careful to keep the egg in a lying down position, don't turn it over or upside down or anything
You may need to use a different light, like your phones torch, to do that.
Candle from the air cell
It would just be good to see a bit better, if you can. If the air cell is a good size you may be able to lock them down sooner than expected