Refresh the metadata for the entire library. So, I would give the following a try and see if that helps first of all… When that has occured for me I have manually forced a refresh of metadata for that file and it has always picked up the right info second time round. I have seen, on occasion, that when I add a file to a library I do use, it does not always identify it and update straight away from the Metadata. I just assumed that was down to the files themselves and as I am not streaming music from it I have never bothered to look in more detail. I honestly don’t know how good the metadata is on those files as I have never looked, but Plex is a little inconsistent on mine. Mine are in a single Music folder and then subdivided by artist, then again by Album etc. I have approximately 95Gb of Music (all MP3s) on my NAS but I don’t really use it for streaming music files (just as a store), so am not too familiar with that side of things. What version of Server are you using, it should be v1.

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