I have been having a hard time syncing some local files on my iPhone5s. I have more than enough storage on my phone and am on the same wifi as my desktop... I am under the limit of synced songs per device, but no matter what I do it will not let me sync certain songs from my itunes library or my music folder in finder (I'm on a Mac).

It's weird because I can add other songs just fine, but for some reason it refuses to let me sync anything from the Battlestar Galactica soundtracks (by: Bear McCreary) or anything from Blizzard (Diablo III or WoW soundtracks), or anything that I've bought/downloaded from Soundcloud, including a few various misc. songs. I'm curious if Spotify will block certain artists or specific albums from being synced in local files. Although, I can sync the Caprica soundtrack just fine and that's by Bear McCreary, as well.

All of my mp3s (they're all in MP3 format) have been legitimately paid for (mostly bought on iTunes), so I'm not quite sure what the issue is. All of the file names look okay and don't have any weird symbols or quotations in the titles. I've tried deleting and reinstalling Spotify both on my iPhone and on my desktop several times with no change. All of the local files will play on the desktop version just fine but refuse to sync to my phone.

Has anyone else encountered this before?