Plo Koon & Ki-Adi-Mundi. And that's what surprise does for you. The film doesn't go into detail (thanks to cut scenes - especially with Obi-Wan & Cody) but the Jedi were friends with these clones. They never suspected, except for Yoda - and only then when he sensed a disturbance in the Force. And Entropy, only from a certain point of view.