When hosting official tournaments like Grand Slam and Classic we exclusively use our new bracket maker in order to avoid any potential rigging of the bracket by the hosts. However, this same policy has not yet been extended to our Circuit Tournaments, which is why we're implementing that today. As of right now every Circuit Tournament bracket has to be generated using the Smogon bracket maker. Luigi wrote a guide on how to use the bracket maker, which can be found here. If the format of your circuit isn't suitable for the Smogon bracket maker, please contact me (Tony#2848) directly before using an alternative.