I have had this happen - when I copied abt 2K files to a new PC I got abt 10 tracks out of place, all added to some album that seemed unrelated. I just changed the tag info on each track to match those that were placed correctly. If "Album Artist" is the same and the album name is the same, they should appear in the same album on Jriver. You may need to screw with it a while to get it all straight - sometimes it is easier to delete the files and re-rip, making sure you have album artist and title set the way you desire.