jriver showing duplicate minim filenames

[PieterM]

Files served by minim show up twice in JRiver. Some guidance would be much appreciated. As I am unsure if this is Minim or Jriver related, I have posted this question on computer audiophile forum as well.

My setup:
Synology NAS running Minim server. Controlled by Plugplayer. Rendered by Audio Research Reference DAC.
I use Jriver to manage/sort/tag the music files (mostly WAV).

In Jriver under filename I get: Volumes/Music/[Artist]/[Album]/[Trackname]
But the same file also shows up as: http://[lan NAS address]:[port]/minimserver/*/Music/[Artist]/[Album]/[Trackname]

This happens throughout the library. If I delete all http://etc files they automatically are recreated (not at once, but over time).

Any ideas what may be causing this issue? Thank you.