hello, i have a brand-new mac (just switched from PC, but i've used macs most of my life) and i'm adding a bunch of mp3s from my old computer, which i burned onto cds, to the itunes library. my problem is that many of the songs appear TWICE or even three times in the itunes library after i add them. in the actual music folder they also appear twice, labeled as (for example) neil young - harvest moon.mp3 and neil young - harvest moon 1.mp3. some of the folders i added to the itunes library were full albums that had .m3u playlists included in the folders, and i think the playlists may have caused this problem? is this the cause, and is there any easy way to get rid of the duplicate files (besides manually deleting each one?) thanks!