The only thing that automatically advances your team and robot to the District Championship is winning the Chairman's Award.
64 teams move on to the District Championship, 10 of them by winning Chairman's and the other 54 are based on the point earned at your first two district events in chronological order. Because some of the points are awarded based on ranking after qualification rounds and the alliance selection process it is entirely possible that a team or teams that did not win the event earned more points than your team.
Hopefully everything goes as planned and you will be able to see your current points and where you rank here:
http://frc-districtrankings.usfirst.org/ by 9am Pacific Time on Mon.