DDH... so sorry to hear about this frustration
I know how hard you have been working at this and having fun while you do it.
I'm no doctor, so I will make no comment at all about the medical issues...

But here is my experience of weight loss and fitness...

The first full year I started biking regularly, I lost no weight, but I did drop two dress sizes. It is only the past 2 years or so that I have begun to see permanant weight loss and a downward trend...

You say you lost no weight - but did your body change shape as you became fitter?

Wishing you well-behaved feet, and an end to frustration,
Rave