A bit old but make sure it's not making them or adding the .m2a at the end. I had that problem too. I would transfer my Digital copies to say my DropBox account then using my Astro File Explorer copy them to my phone and it would add the m2a at the end of each song. The bad part is I would have to go one by one and rename them to remove the last m2a and just leave the .mp3 . After that I just did a full rescan and it read the file with the album art as well.