What you're referring to is a widespread issue with the metadata in the files of your music collection. Manually editing all the right details of the tracks and albums in iTunes is the most immediate way of fixing things, just be sure you enter them into the proper fields.
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"Standing on a well-chilled cinder, we see the fading of the suns, and try to recall the vanished brilliance of the origin of the worlds."
-Georges Lemaitre
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-Gem Tos
