Calico morph?

[Bogertophis]

...I would not be surprised if this is some sort of hybrid that has been sensationalised. This is just my personal take and I may stand corrected. Your initial photo I believe to be a Leucistic Texas rat snake. The colored individuals I think may be hybrids.

Anything's possible- just like with BPs, some are trying awfully hard to come up with unique snakes that fetch higher prices. And not all breeders will fess up to their "secret sauce".