[wups]

pawn Код:

public OnPlayerSpawn( playerid )
{
    if ( PosX[ playerid ] != 0 && PosY[ playerid ] != 0 && PosZ[ playerid ] != 0 )
    {
        SetPlayerPos( playerid, PosX[ playerid ], PosY[ playerid ], PosZ[ playerid ] );
        SetPlayerFacingAngle( playerid, Angle[ playerid ] );
        SendClientMessage( playerid, -1, "welcome to your last position" );
    }
    return ( 1 );
}

This would cause loading the position every spawn(even after death).
+ You don't clear the variables:
Player 0 loads his data, and disconnects. A newbie connects with ID 0, and gets spawned to the position.