(Bobby returns)

And therein lies the problem 2on2s do not affect quality. So, when scoring, if in a round you have only 2on2s and no duels, the opp quality is NULL (this does not exactly evaluate to 0 like in many languages, it is seperate in MySQL). So, to get the opp quality, Opp Quality/Num of duels * factor

Meaning:
NULL / 0 * factor = an error that mysql can't calculate and therefore when your score is sorted, you are at the top and you have 0 points.