That sounds like perfectly normal behavior to me. Not at all like the "wobble" in spiders.
Just FYI...there is no such thing as "carrying the spider gene" unless the snake IS a spider morph. There is no "het for spider" or "possible het for spider."
I have never seen it, but I HAVE heard stories of non-spiders spinning or "wobbling." But personally, I believe that while it is a similar phenomenon, it probably does not have the same direct cause (whatever it is) as the spider wobble.