I don't understand why a documentary filmmaker would deliberately mislead an audience by placing an event that happened on 08/14/07 BEFORE and event that took place on 10/14/06 - in the film.
It's a bit dishonest to say the least, and kind of lessens the impact of the entire film.
This is several years late, but as a filmmaker who has done a music documentary, I can tell you that a movie has to follow a format that entertains. Otherwise, it won't be watched. It also needs to tell a story people can and want to follow. My last doc was bookended by performances from the same show, despite the movie covering events that occurred both before and after that show. Why? Because it ended the movie on the right note to support the purpose of the documentary. Telling the truth about the point you are making with the movie does not mean showing events in a particular order. It's about showing events to the audience in the order needed to support the movie's intentions. Now, if moments were staged, that's a different animal. That is reality TV BS. Having been around the music business and in metal for as long as I have though, I have seen moments like those suspected of being staged happen frequently. It's an ugly business at times, and even the most laid back of people can lose it under those circumstances.
Documentaries are meant to be the truth as seen by the person making the film. If the filmmaker belives that Anvil felt a piece of the glory they'd always sought at that show in Japan, then it makes sense that it would be shown last. It's not to deceive an audience. It's to end the movie with the feeling the filmmaker was going for. It is a movie. Most documantaries, including those that have won Oscars, etc, do the same thing. It's not about sequence. it's about writing an essay in movie form to support an idea as well as entertain.