Well, I ripped about 300 CDs into my iTune library in the past 2 years. Inevitably, One track weren't ripped completely or correctly...so yesterday I bought this MP3s from Amazon thinking I will just replace the corrupted with the MP3s bought from Amazon. Well, things didn't go exactly smooth. I copy & paste the Amazon MP3s into the folder where the corrupted MP3 is located. Deleted the corrupted (including file) from iTune. Telling iTune to add the Amazon MP3 (add to library)...but it shows up as another album instead of as a track on the original album. I also realized that the song version bought from amazon is slightly different than the corrupted file...so the album art is different too. I guess I can time machine this thing and start over again, but how do I proceed once restored? Don't want to make the same mistake again.