Under #3, you have it listed as "PWR" (for power, lol) when it's actually PRW, referring to Player Rating.
From Silent mod FAQ:
Player Rating
This is a measure of how much the player contributes to winning a map. This measure is calculated by seeing how many times this player is on the winning team after every map, and how good the opposing team was. Like kill rating, winning against teams with a high average player rating results in player rating increasing faster.