I played through all 5 leaver buster matches; and I am still in low priority que

So, I left a match that had already been won. I was literally like, guys can you finish up without me? Everyone said yes, I come back to a victory screen. Exit out, and I have leaver buster.

So I play each match with the low priorty que, each time it tells me how many matches I have left. I finish my final match, go to start another one; and I am still in low priorty que, but I didn't get a popup telling me how many matches I have left. I played through that match. I am still in low priority que.