Re-tag them!
You can use your current media player to do so. Alternatively, using
http://www.foobar2000.org/ open the track, right click, properties, and alter the metadata.
Regarding the scores, if it's just typo's, then you needn't do anything. If you called a song Y when it was in fact X, then you're on the wrong board entirely, so click the report button to file that score for removal.