Oh, and just for shits... Let's say there were two Tobis... The first one who controlled the 3rd mizukage.... It was Danzo.
Remember, at the bridge Danzo died at, he recognized Tobi as Madara, even though he wasn't at the meeting when Tobi made his appearance.
I said it long ago, Danzo was somehow knowledgeable of all these shenanigans that were going on. Danzo's right eye was Shisui's eye... The same eye that the Tobi mask only ever showed.
Feel free to trash this theory too, you nitwits have nothing better to do.