Eh Jorus wasn't too different from the other rogues in the Jedi Order. You have Sifo-Dyas who claims that a great war is coming bad the Jedi will have to prepare to fight. You have Dooku who keeps saying that the Jedi shouldn't be bound by the Senate, and they should take matters into their own hands. And then you have Qui-Gon who insists he's found the Chosen One and that he must be trained, despite being too old, C'Boath was just one of many eccentric Jedi Masters that the Council tolerated, unaware that he was on a path to the Dark side. The Council had no idea Dooku was on the Dark side until it was too late.