I know you have another post on the other forum but I am replying to this one you started here.
I have done a lot of crosses and I pay attention to any new ones in the market. Sometimes when doing a 50/50 hybrid back to one of the original pure species you will get some neonates that look more like the pure spp. but that is because it is essentially a 25% 75% cross. In you case there is no sign of any cali in that snake which makes me doubt what happened there. The other thing is you bred an albino to an unkown het Prarie. Then we discover the Prarie king is allelic to the Cali gene. If this is true then that is an interesting revelation on its own.
I am not saying you didn't breed the Prarie to a snow cali, I just think there is more to this than we (you and I) know.
Can you post a pic of the parents?