Event triggering multiple times.

[kaytotes]

I have searched but have some how not found anything that hints towards help on this matter. PARTY_KILL seems to run twice every time. I can't seem to discern why or how to prevent this. Any help is much appreciated.

killTracker = CreateFrame( "Frame" );
killTracker:RegisterEvent( "COMBAT_LOG_EVENT_UNFILTERED" );

killTracker:SetScript("OnEvent", function(_, _, _, event, _, sourceGUID, sourceName, _, _, destGUID, destName,  destFlags)
	if ( event == "PARTY_KILL" and sourceGUID == player) then
		if( inInstance == true ) then
			if( instanceType == "pvp" or instanceType == "arena" ) then
				message:AddMessage( "Killing Blow!", 1, 1, 0, 53, 3 );
			end
		end
	end

	if( event == "PARTY_KILL" ) then
		local string = sourceName.." killed "..destName;
		UpdateKills( string );
	end
end);