The inability to edit may be related to
MBS-3498, however the inconsistent display is concerning.
Tracklist is displaying track 3 as "Within Temptation $ The Metropole Orchestra". When you try and edit the tracklist, it displays "Within Temptation & The Metropole Orchestra" so you can't correct it.
Edit history at http://musicbrainz.org/edit/14768951 implies it was actually (accidentally I guess) changed to $ originally.