Well... I tried to tinker with double elimination since I had never played with it before. Its max is 8 teams, well when I switched back to single it started the tournie as it stayed at 8, bit it does include the 15 teams already registered.
Since Ani posted a team and was one click away from being official her rpteam will be the "bye team" instead of the currenr vacant spot.
I apologize for this folly but do not worry, you may still gather teamates/subs if needed.