Mine went back a couple of times for adjustment and they're still not 100%. However, as the cost of sending them back mounts up, I am just going to live with the slight misfit.
Mine were not remoulded, just adjusted.
I would take a number of photos of the JH16 in your ears and then make notes of what and where the problems are on the photos.
How many times did you send for refit? We're they just based on photos and written instructions?
That's why I am thinking of send my other custom with good fit in to help nail the issue (not sure if it helps though). My first pair of jh custom has a good fit and was told that impression is on records and good for the new order.....took the plunge but the pair turn out anything but....