[Wesley221]

Thats because you didnt stored the 'killerid's name in a variable.

pawn Код:

format(killstringa, sizeof(killstringa), " /*this is for a string*/%s is on a killing spree with 3 kills!", /*this is an integer*/killerid);

So that will give random characters.

pawn Код:

stock GetName(playerid)
{
    new Name[24];
    GetPlayerName(playerid, Name, 24);
    return Name;
}
format(killstringa, sizeof(killstringa), " %s is on a killing spree with 3 kills!", GetName(killerid));

The 'GetName()' will return the 'playerid's name, this can be anyones name.