I would say this is typical Spider wobble for a more severe case. I actually have two spiders that have a wobble / spin like that, a Spider Pied and a Pastel Spider Pied. Both eat just fine, will even take live just fine too. Just be sure to keep a smaller water dish in there with them, don't ever put them in a water tub to soak without constant supervision. I use the built in Dixie cups in my ARS tubs and that seems to work fine, they can get out of it no problem. I also like to spray them down with water instead of soaking them. I've seen this to a more severe extent with a Champagne in a pet store, the poor thing was crawling on his back belly up and couldn't flip himself over. Even though the movements are not natural they still thrive in all the cases that I've seen, it's just a bit strange. I haven't bred enough of my Spiders to know if the wobble is genetic to one specific line of Spiders or if it's just a random chance in any Spider line. I have a few spiders that are perfectly fine with no wobble at all.