What do these 2 icons mean in Killzone 2?

When a Skirmish match ends in Killzone 2, stats are shown. I’m pretty sure I know what most of the icons mean, but what do the 2 with ??? mean?

And why does Tremethick have -1 for one of his stats?

Scoreboard with all the icons


Solution 1:

The pentagon is objective points. In Body Count it's points for kills, in Assassination it's for killing the target or surviving as the target, Capture and Hold it's for killing people in the capture zones, etc.

The slashed O means penalty points (team kills + suicides)