I have used the PC based sync app to copy my music library over to my WP 8.1 device. I have discovered plenty of issues with the music player noting its inferiority to the one in WP7, but today I just stumbled across this little gem. When I navigate to certain albums, I find an incomplete list of tracks attributed to the album. All of the tracks show up properly in 3rd party music players, so I know that they are tagged with the correct meta-data. Has anyone else noticed this, and is there a way to correct it? It is very hard to spot, because it is not a problem on all of my albums, but it seems to be more than just the one.