I tought about this last night: What if the malfuntion of the red sar was planned by the Great Beings as yet another failsafe. If a large amouth of bad guys appeared in the universe the red star would stop working to prevent the evil beigns to return and start all over again.This theory could work because Greg stated the red star stopped working a long time ago, And a long time ago the league of six kingdoms was formed.EDIT:The GB's placed the Kestorra in the star to check if the beings that were sended there were evil or not, if they were evil they had to be locked upin the star, and then be analysed by the kestorra, if they were good they should have been manually send back by the kestorra. But the kestora weren't able to use the manual sendback due a lack of training because of the early departure of the Grait Spirit Bot. So after the automatic sendback was turned off the Kestora went mad due overpopulation. Some of the most desperate kestora tried to master the manual sendback but they accidently sent themselves to the City Of Silver. It is just a theory though...