How is this game not an S+?
Before you downvote and leave, read this. I'm genuinely curious for some insight.
I got autofilled yesterday, and I didn't really feel like playing a meta support, so I locked in Singed. I did really well, with a KDA of 13/3/16. Game 1: http://imgur.com/a/a5PhM I only got an S-.
I played another game after that, and got autofilled again. I decided to play Singed support again. I ended up with a KDA of 8/5/17. Game 2: http://imgur.com/a/ryr5m In this game, I got an S+.
Don't get me wrong, I'm not salty or anything. I already have my Mastery 7 Singed, I don't need S+ tokens. I'm just curious as to how Riot's grading system works, since in Game 1 I had more kills, less deaths, and more cs, but in Game 2 I had less kills, more deaths, and less cs (and 1 more assist). So, I thought that I did better in Game 1 than Game 2, but apparently my performance in Game 2 was better?
Thoughts?