I played in a tourney last week, and noticed that the TD created it four times (The Official Unofficial Ghostbuster LE Launch Party and Tournament 9/8/2016). I know that a couple of those were because he entered the players, generated the first round of matches (4 person matchplay) and then realized that he had failed to entered a few players. That happened twice. Each time, I believe that he cloned the previous tournament, entered the new players, and re-generated the matches.
I don’t know if there’s a lesson there. I haven’t run a tournament, so I’m unfamiliar with the software. Seems like he was missing something, though. If you know what he was missing, then you can tell me (or him).