Whats a L20 team doing with a average quality of 98.9??? Sounds like that L20 team is abandoned since you only lost 2-1. I'm L15 and my average quality is 99.8
Most of the games are just based on probability, a random number generator, to determine what happens in the game. So sometimes you can get the odd bogus results on this game and not many players like it to be honest, I had a 0-0 draw 2 days in a league game playing 4-2-2-2 hexagon vs a standard 3-4-3 formation and being 18 quality better, It throws all logic right out the window.