Well, if the ones that died were tiny scaled ones, I would have thought; low chance of survival for them. But all baby's that died in the egg, except perhaps one that was too small to check, had normal scales. Since the father and mother are het for it, and healthy as can be, I can't conclude that snakes 'het for tiny scaled' can't make it. At the other hand, two eggs crumpled after a couple of days, maybe those were tiny scaleds too, but still: why would almost all normals die and two of the mutated ones live?
By the way, one tiny scaled one ate half an hour ago
The other one not (yet) but that one seems a little blueish.