I'm not sure if I've mentioned this or not. But late at night when the server dies down, it takes forever for the zombies to spawn, and the clock stops working. So once the clock hits 0:00 at the end of the round, the round still goes until the CTs are dead, but if there's absolutely no way for the CTs to die, then the round keeps going on forever. There are 24 players in the server at the moment, and the clock still doesn't work.
It's a problem with the ZombieMod script i believe. If there are too few players, it stop working properly. That's what causes the clock to disable, and the spawning to seem to not work. -Reaper