[Konstantinos]

You seem to be checking most of them but you got one wrong:

pawn Код:

if(PlayerinMMDM[killerid] == 1 && killerid != INVALID_PLAYER_ID)

the check about killerid not equal to INVALID_PLAYER_ID must be first. Few lines after, there is also this line:

pawn Код:

if(InDual[playerid] == 1 || InDual[killerid] == 1)

which does not check.

I suggest you to compile with debug info (pawn.cfg file into pawno folder and write -d3 in it) and you'll be getting the exact line.