Plat 3 player, played all my placements in plat-diamond lobbies, go 2-3 match MVP'ing both wins (one with 30 kills), placed silver 2. Silver 2? Like, what even?

Hello people, Since beta I'm playing with a friend who is fan of making kills using knives. I have seen him drop knife kills in gold/play lobbies with much patient and skill. We were surprised to find out that knife kills don't appear as...

Yeah, apparently trimming your fingernails affect the way you play. After trimming them you will feel a lighter weight to your mouse and keyboard and make you flick faster or move. Does anyone do this also? what are your thoughts?