I've found your problem through the graph! The multisource targets the teleporter, don't do that!!! Write down in the trigger_teleport's master value the name of the multisorce and here you go, when the multisource is on the teleporter is on too just like with locked doors!(make sure the teleport has a name)
(the multisource starts off but I think you want it to start like that but if you don't want it to start off use trigger_auto to target the first multi_manager)!!! Mmmm... Through your graph I can see that you want the teleporter to be switched from off to on until you exit the game! If you don't want it to happen just don't tell the secound multi_manager to trigger the first one(only tell the first one to trigger the secound one)