Hi!
" Normally you use the handheld engine to sync content to a device, not browse / play on a device."
I also only use it for syncing. The drive is configured as a handheld and MC syncs a couple of playlists there. Mediacenter does not play from that handheld/device. The NAS drive is for my Control4 system to have access to my music.
" Also, I think you're saying you have two library entries under Audio in the tree with identical filenames, like V:\My Music\1.mp3. Is that correct?"
Yes your assumption is correct. For any file available on the NAS I have a duplicate entry in my MC library with the same filenames.
The NAS drive is, as said before, set to "exlucde" in auto-import settings.
I have this setup for about 2 years now and never experienced this. It somehow started with MC19 I think.
regards