Lemme give it a shot.
#1 - Uhm.... out of nowhere you suddenly start being racist. LOL. And then you whine all game insulting your teammates. Hmmm... you can look at that case and think there's nothing wrong with it? It's not about you feeding.. there's no such thing as "KSing", and you call to report your teammates all game while the game is going on. Like, you don't just say it once, you keep repeating it. I think you said it like what, 14 times?
#2 - Why are you telling mundo he sucks? Hmm, aside from that, not much here.
My guess is you got punished because of your first game, aside from a bit of ragging on mundo there isn't much to the second. That's probably why it got only a majority (In other words: A close case) instead of anything else.