Album Artwork

[sotm31]

So, some of my artwork shows up, the majority is a generic color and album name. I go and change the artwork, but it does not seem to update in Subsonic or any apps associated. I have checked the log, and it says "[7/8/15 4:02:27 PM CDT] INFO CoverArtService Backed up old image file to /Volumes/XXX11/Itunes2/iTunes Media/Music/The Eagles/Desperado/cover.backup.jpg"
So i guess my question is? why wont it appear in Subsonic (web browser) nor my App on my Iphone. I paid for the full subscription, and honest> not cool if I can't see the real artwork for whats playing, instead I get a generic icon.