I went through something like this with one of my BEL's. The snake is either very ill or, wait for it ....., it is a spider. Get it in different light or under a blacklight. If it is a spider the alien heads will appear to be more tightly packed then they would be in the base morph. In my case I hadn't intended to buy a spider and the breeder missed it. It is very hard to tell unless you know exactly what you are looking for.