I Have this same issue with my hd500. I ve done everything I should, tried to save each patch or the whole list but when I change the patch and come back to the on I changed it just didnt save. I m sure this is a bug. And today it was even more strange: I had the HD connected to my laptop with the HD editor. I edited the patch through the sotware and hit with my foot (after sending the saved modifications from the laptop to the hardware) another patch. Then when I hit back (through foot) to the modified patch, and the sound heard was the old one while the changes I made via the software where registered vissually but the sound didn t changed. Then I double clicked (with my finger) this patch that was selected and the sound finally got new. But everytime I save (and the software confirmed it) whenever I change this patch into another one and try to recall it, I still can only find the older one.
And this has happened not only with volume but also with delays BPM. I m not sure if using ll the User banks has made the hardwares memory so full that it can handle new storing operations. I ve also tried to change names of the patches or bring louder similar presets to that patch, but it doesnt works. When this patch is not working no matter what I try to save or replace, it never accepts new comands (that s why I believe it has something to do with the hardware s memory or processor capability...)
Also, none of these patches are at its maximum volumes, cause i can ake it louder once, but the patchs new information just desapears when I try to recall it. It goes back to previous sound although the visual modifications are still visible. Really weird. I m afraid that this maybe be the reason why they did the Hd500x, cause they noticed that the HD500 processor or memory couldn t handle the pacths bank (factory and user) all together...hope I m wrong.