You don't even know what the spider mutation is and yet you suggest-

I suggest that the spider morph is a relative to the normal type ball python that took a different evolutionary path. Both relatives have thier strengths and weaknesses... but both must have worked well enough for us to be able to find them in the wild like we did.
It is very probable to be a point mutation with a promoter controlling the level of expression really no grounds to suggest an evolutionary divergence.

Also, if your going to call my statements wrong then address it with facts. Your argument seems to be based on many what if scenarios that would give it some validity. If you want to do the science by all mean go for it, but speculation doesn't go far these days.