KO1 and KO2 for canyon, are permantely closed. Soon KO3 and KO4 will close, and new KO5 and KO6 will open. This is the way the track pools work, Once we have enough, we make more groups, the criteria does change from time to time.
Currently we need to slow down on canyon and fill KO1 and KO2 for valley and stadium so we can Open KO3 and KO4 for those enviros. Oneday we may have mixed enviro servers and these pools will be merged (and some tracks will be discarded)
I normally only test the tracks being played on that weekend, during the week leading up, unless I have spare time.