Could the Cowboy Bebop movie be set a few years after the series?
According to the wiki. 


  The later Cowboy Bebop movie Knockin' on Heaven's Door is said to be set between episodes 22 and 23 of the original TV series, but Shinichiro Watanabe will not rule out the idea that the movie is a dream.


So I would say its definitely not after the movie since the creators think it was either a dream or between the old episodes.