Because it's an obscure song from 17 years ago I guess. There are a lot of songs like that. Even from Reroute you rarely hear them play Egonomic, Dawn of a New Day, Minus , Dark Signs or Dismiss the Cynic. Also you have to remember Anders and Bjorn are self-admittedly lazy. They aren't going to re-learn older songs they haven't played much before. That's why they played The Hive on repeat for about 10 years rather than anything else off Whoracle.