Ah. To the best of my knowledge, adding an event to your history only makes it show up for your event history, and I haven't been able to add judges to it either.
I think you have to actually create a “new event” all the way through and add judges to it. It is possible to do so for events on dates that are in the past.
Edited Evan Cherry (Aug. 18, 2014 05:11:43 PM)