I'm gonna try to be nice here.
People are unhappy that you allowed two rounds to go past time and 4 turns, causing the whole fiasco to end past 7.
People are unhappy that as a judge you left before the tourney ended. I'm glad you realised you have plans well guess what so do we.
I understand you were envisioning a "Double Elimination cut to Top 4 playoff" but what was announced was "Double Elimination" so follow that.
An example of an 11 man Double Elimination bracket can be found here.
It really is alot easier to understand that it looks. The mistake was evident since the first round, as the bracket shows only 4 active tables.
Finally, I am currently using a website that allows for simple Single Eli, Double Eli and Swiss Pairings. You have your iPad, I have made a reusable bracket for all three formats strictly for Econ tourneys. If you want, I can provide the URLs for them in person.
I'm just trying to make sure that if you carry on as the judge, you do your job right. I don't claim to be a bracket genius, if I were I would hav spotted the mistake in Round 1. All I do is bother to give everyone the fairest tourneys possible.