I'm not quite sure what this is supposed to show. My understanding of the water test for eggs that are late to hatch is to put each one in a bowl of warm water, one at a time, then let it settle. Watch it. If there are teeny ripples in the water, the embryo is still alive and moving, even if it's so slight that we can't normally see it by just looking at it. I just don't see where putting them all in a pan of water at once shows much, if anything. Not trying to be argumentative - just trying to learn.
X2! No point at all in putting them all in at one time. "floating" or "sinking" proves nothing about viability to hatch.