I have checked the logs to these games and based on how the tourney was run everything is completely fair. s8 was undefeated going and was the highest seed. In most double elimination tourneys the two teams that had lost would have to play each other and then the winner of those players would play the undefeated team twice having to win both or the original undefeated team would win.
My suggestion going forward for dr.lucas is to run a normal double elimination bracket so issues like this do not come up.