Did the kit that had no front legs look like it was born that way, or could it have had legs that were chewed off? It isn't unusual for does to accidentally bite off ears/legs/other extremities while cleaning kits or pulling out a stuck kit while giving birth.
Since you're breeding meat rabbits, I would also be "less forgiving" when it comes to unproductive does that are poor mothers. First time mothers can be a little crazy, but seeing as Alice has done the same thing twice, I don't think that is a good excuse. A meat rabbit that isn't producing and...