[un1versal]

Could be a release thing, some releases made in some countries have different track nrs or tracks in general, so the tags also carry these distinctions.

There's a setting in xbmc Settings/Music#Library (wiki) that says Override song tags with online information, if you dont want what its tagged to be overridden then dont select this, and if thats not the case, consider the release info which is in that tag belong to the wrong release.