Just updated the teams and stadiums. Just to clarify first come - first served means that the first team to enter their team will have their choice of stadium. The theme league when set up to only allow one of each stadium will not allow a second team to enter with that same stadium once it is taken. Since some owners do not check the forum it is not possible to keep some owners from selecting a stadium that another owner may want. Therefore the first come - first served warning.
Obviously any theme league creator would not want to keep anyone from playing in their league. It is hard enough to fill leagues.