5v5 Normals Post Game Champion ranks

Ok! So as you can see here my team won, I'm . Everyone on my team got an S rank except me. dc'd for five minutes and still managed to get an S. I got an A-. My score is 9/4/11 and is 11/7/6. And then comparing my score to which is 4/5/6 how is it I didn't get an S?! Please someone explain this to me! How is it possible for a Kog to get an S with that score and not a Morg?!