Hi, I'm getting multiple money rewards for killing mobs, and multiple messages. Drops are fine and work okay, but money rewards multiply by up to 4.

In this picture I killed 1 skeleton, 1 pig, and 1 spider.

I was rewarded a total of 12 coin for it.

http://i40.tinypic.com/idsv49.png

From my default.yml:
(it is in additive mode with a chance of dropping gold nuggets, which works, it's just the money that doesn't)

Skeleton:
    Drops: '371:1:40'
    Coin_Minimum: 1.00
    Coin_Maximum: 3.00
    Coin_Percent: 100.0

Spider:
    Drops: '371:1:40'
    Coin_Minimum: 0.50
    Coin_Maximum: 1.50
    Coin_Percent: 50.0

That's ok. Haven't gotten any other reports like this so I was suspecting duplicate events firing from bukkit.

What version of bukkit are you using? You can find this in the server.log.

1714 though I'm afraid I'm not using the plugin any more.