After a 3 volume attempt at releasing SDMI on DVD, Warner Home Video just decided to wrap up season 1 (13-26) on one DVD set on January 24th 2012. There isn't a "Season 1, Part 1" set, but you get the point. If they really wanted to help they would've released a complete season 1 boxset, but Cartoon Network shows don't get that kind of support anymore.
Oh, and I guess that answers the "Season 1 vs. Season 2" questions...
Source: tvshowsondvd.com -- Anythingspossibleforapossible 00:18, October 13, 2011 (UTC)