Edge of The Century was recorded twice, since Glen 'goofed' on the lyrics the 1st time around.
Since they were planning to re-release it as a single for the upcoming millenium,
they went back and re-recorded the proper version!
Note: The Unplugged songs were just "snippets" of the songs, usually to the first chorus.
They were just experimenting with playing "A Criminal Mind" so only the 1st minute or 2
was played.