He could be spinning more due to the stress of changing the cage around.
I know that stress makes them spin alot worse for a couple of days, when i put Billy in to his new cage it really made his spin worse
yeah it does look like Billy cant help but spin, he can walk in a straight line but will do a turn in the process.
Wth the ball keep trying, when i first put Billy in his ball he just used to spin but now hes got the hang of how to use it and i find it does help his spinning by giving him ball time.