It can be risky leaving that cord on, you may want to cut it off, very carefully, closest to the snake's bodies. For some it will just fall off on it's own, but if the cord catches on anything it can disembowel them. Terri is right, the snake came out of the egg to early. Sometimes checking on them too often can cause them to emerge prematurely, or sometimes they just do it for no apparent reason. I remember Rich Z once said that when he does need to remove hatchlings from an egg box and there are still eggs pipping, he gently touches them on the nose so they will go into thier egg while he does what he needs to do and then gets out of there ASAP.