So I think you've been mislead. The snake I'm seeing appears to be a single gene spider. Is it possible that you misheard the breeder and that they may have called it a spider het ghost/hypo? That would explain the normal appearing spider animal shown in the pics. Also, I think someone posted some information on genetics. The spider gene is dominant and pastel is co-dominant. There aren't any animals the would be "het" for these genes. The "het" refers to an animal that carries a recessive gene that is not expressed. For example a "het albino" animal carries the albino gene but it doesn't look like an albino.