I don't know if the team is already because it is a common issue but I didn't see it on the in progress list. The issue is, sometimes when 2 players need to face each other for a tournament, so one player challenges the other one but as he sends the challenge, the other player is also picking a team and sending a challenge. Then, both players get a challenge and both accept, which leads to this situation :
I don't remember it happening before, so my suggestion is : if someone already challenged you, you cannot challenge this same person back until you answered to his challenge. It is a really important issue as sometimes tournament players end up using two different teams against a player who has brought the same team twice, which can lead to the player with two teams picking the most favorable matchup or having revealed a team he wanted to keep hidden for later. Wether this is already in fixing phase or I am the first to bring it up I hope it gets fixed before SSD and OLT playoffs.