jbs is right -- metadata is not standardized. And its been that way going as far back as I can remember, into the days of what could find on a LP label or album cover. You would find incorrect song titles or times, and sometimes even in the wrong order. One gets the feeling that the job was always assigned to the lowest level employee available.
However, regarding the (live) label, I can see many people thinking it is important to differentiate between the live and studio versions of a song. Like jbs, I often edit my metadata on my personal collection using MP3Tag so that it appears in the way most meaningful to me.