I understand what you are asking. Since she seems to have the spider wobble, you are asking if it is possible one of her parents was a spider and she inherited the wobble from the spider parent. I suppose that is theoretically possible, but I've never heard of such a thing. Any baby born from a spider parent that isn't visually a spider does not wobble that I have ever heard of.
More likely, it was a birth defect or cause by exposure to chemicals. Since she was a pet shop snake, either is a distinct possibility. It doesn't mean she cannot live a normal life. If she can eat and poo and shed normally, just think of her as having a bit more personality than most normal ball pythons.
Gale