I don't think it was actually cancelled, just trimmed to 9 episodes on 10/23/2015.
See here: http://www.metacritic.com/feature/tv-renewal-scorecard-2015-2016-season
You're the Worst Season 2 starts September 9, but moves from FX to FXX so if you had a series recording for FX instead of "All Channels" it will not pick it up.