Well, for starters, it's wrong on DRK.MN and two, it's due to funding multiple masternodes at once (using add recipient) with the first address getting all the payments for the other masternodes:
http://explorer.darkcoin.fr/tx/eb4ca541f6da61ad7e2e93ca0ffaee8355d3e0abae6404e4afe5540bc90abec4#o0...