Hmm, that does leave us with a continuity problem, however. After the days of Darth Bane, there can only be two Sith - the master and the apprentice. But if Palpatine ordered Dooku to kill Sifo Dyas, then it doesn't add up, since that took place before the events of Episode I (according to Obi-Wan's statements in Episode II), at which time Sidious naturally still had Maul as his apprentice. This way we end with at least one Sith too many, and it also begs the question of who then deleted Kamino from the jedi archives, since Sifo-Dyas wouldn't have, and Dooku couldn't having already left the jedi order (or he would not be working for Palpatine yet)...
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Well Dooku become Sidiouses aprentice in the same year as Maul died so i think he was taken as his aprentice just after Maul died. Hmm i am not sure at all but i thought that Obi said that Sifo died ten years ago what is actually when the events of epi 1 happened, so it could happened just after Maul died. And i think that Palpy found out that Sifo was ordering a army for the rebublic so he ordered his new aprentice who still was within the Jedi Order(spying for Palpy) to delete the Kamino from jedi archieves and then go straight to location Sifo and kill him. Wikipedia is great isent it?