the complete series of Bizarre

To address your first question - when a company releases a "Best of" compilation, it's because they don't think the complete series of a show is either cost-prohibitive to produce or that it might appeal to only a limited segment of the market. Ever notice why you haven't seen complete seasons of SCTV or Saturday Night Live? In any case, I wouldn't hold my breath for 6 complete season sets (25 episodes each) of Bizarre...although that certainly would be nice!

Now, to address your second question. There are different running times for these shows as some contain sketches added because the original broadcasted sketch might've contained content not legally cleared for distribution on DVD. An example of this is on episode 6 on the Vol 1 DVD, which is premiere episode of the second season (1981). The show, as originally broadcasted on Showtime, contained a sketch involving Billy Barty lip-synching to a couple of songs recorded by Robert Goulet and Barbra Streisand. John steps in and chastizes Billy for cheating the audience, but then proceeds to do the exact same thing himself to close out the piece (in typical Bizarre style). This sketch followed following the battle of the faith healers sketch. I assume there was a licensing conflict or other similar legal matter which would've prevented this from being seen. Whatever the case may be, a sketch from a later season about the blonde topless waitress was substituted.

And, about the 3rd issue - there were defintely 2 versions of Bizarre. One containted nudity and was shown on the Showtime pay-cable network from 1981 to 1986. Showtime advertised the last season as "Bizarre '86" since it was boradcast during mid-1986, even though that season was produced in 1985. The other version (for syndication) contained no nudity or swearing. I remember KTLA Channel 5 in Los Angeles picked up the syndication package in 1985 and aired them at 11:00 p.m. weeknights. Typically, a network affiliate or local station will express interest in a show for syndication once the show has 100 episodes in the can. Of course, the KTLA rebroadcasts didn't contain any nudity, the curses were replaced by the annoying sound of car horns and the shows were awkwardly re-edited to contain 2-3 commercial breaks that totally ruined the show's flow. It only lasted about a year there and they mostly showed episodes from the first 3 seasons.

Hope that helps!