When I got him it looked like he had a bit of a spinal deformity, but I think that was just because he was emaciated. Since he has gained weight, I haven't noticed any problems with his spine or any issues swimming. When I got him, he had problems swimming (he just floated sideways at the top of his tank), was super lethargic and clamped, and his fins were in shreds.
With proper care, it's been less than 2 weeks and he has gained weight and his fins are starting to grow back. He has also colored up like crazy.
In the pictures from today he was moving around a lot and flaring, so most of the pics I got are blurry ones of him looking sideways. These couple pics were the ones in focus.