Are you sure you actually tore the snakes skin? That seems a little odd and blood during hatching is something I see all the time.
If the eggs and snakes inside them are that dry, which is an extreme I have never seen before I personally would put a few drops of water in each one. Just to see what happens.
I am not much of a cutter, but at this point I'd probably operate on at least one to get a better idea of what is goin on inside those eggs.
I have had them take several days to emerge but it seems like you may be facing something else having to do with them drying out during the final stage before the snake leaves the egg?
I hope this works out for you and your babies come out nice n healthy, but I have had Hondurans pip, and look smokin hot....and then days go by and I finally cut the egg and out fumbles a massively kinked baby that could not get out of the egg..... it is always a bummer but its part of this hobby. Good luck
Tom Stevens
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TomsSnakes.com