Complex sentence: Each DVD contains episodes from various seasons of the show, up to Season 10 (the most current season at the time these DVDs were released) however Season 2 was for some reason not featured on any of these volumes.
Split into simpler sentences: Each DVD contains episodes from various seasons of the show up to season 10 (the most current season at the time these DVDs were released). However, season 2 was for some reason not featured on any of these volumes.