i took the level 2 red metal mission (kill 2 easy bots)

after i killed 1 it said something like
1 more to go
1 more to go

then when i killed 1 more it said
You earned a red metal
you earned a red metal

I checked and i had 2 red metals.

That's because you accepted the mission twice.

ug. it's supposed to prevent you from taking more than 1 mission.
Another thing, missions are currently broke so don't use them. Your client may crash as a result.

When did you doubly request the mission? Today? Yesterday? last week?

err.. as far as i know.. last month some time.. Absolutly no clue when.