[Shinja]

Change your timers to SetTimerEx, and your new general_timer; to new general_timer[MAX_PLAYERS];

PHP код:

SetTimerEx("Waittimer", 300000, false, "i", playerid); 
general_timer[playerid] = SetTimerEx("RobTime", 60000, false, "i", playerid); 


And in public RobTime and everywhere else where you used general_timer, add playerid like

PHP код:

public RobTime(playerid)
//KillTimer(general_timer);
KillTimer(general_timer[playerid]);