Oh my, I myself also can't believe some of the things that happen in the world of medicine in General. I shouldn't be too worried about the positive uptake in the bone scan, mine showed that too about 10 months after a surgery I had... just because of inflammation I guess. They sent me for an MRI just to be sure but again..just inflammation.
Hopefully this other doctor will be able to help you. Although it isn't right and i'm not excusing what he did. MRI's are often positive for things that aren't there and negative for things that are there..and it's hard especially after surgery sometimes. However, that doesn't excuse the fact that your surgeon dismissed your continuing pain and disability.