So... what exactly is the formula for the preference thing?

I am curious since I have the "Dynmaic Preference" emblem, while I Played only 3-4 games as a group, another few as duo and most of my games as solo player. Not that I care, but I feel like i should either be getting a solo emblem or an emblem that somehwat signals that I _**occasionally **_play with a friend or two. Now it seems like I was playing a majority of my games as a group which is not the case. In fact, this has been the least form of playing for me.