Good questions to be asked. The specialists doing the work are not necessarily the best diagnosticians. I needed to have my hips replaced a few years back, and I saw an Orthopod about it when the pain started. It took me several months of severe and increasing pain before I eventually got to a Pain Specialist who correctly diagnosed the problem, and then he referred me to...the Orthopod I'd been seeing to do the surgeries.
It was a bit frustrating, to say the least. Not a rap on the Orthopod, but if I'd have started with the Pain Specialist I would have been spared quite a bit of pain.