What i understood of the rules is: Players are required to play the first match in ABD, that will result in 1 of the 9 max ABD games. The loser of that first match is allowed to choose the next mod and so on BUT... clans are also allowed to play all 9 matches of each mod before progressing to the next one, which would be decided by the clan with least wins (Ex:4-5 ABD matches). It is all up to agreement of both parties. What leads players to be confused is the ambuguity of the rules.