Now it's been a few weeks since I watched the episode, but does her "I'll kill John Connor" line to the psychiatrist before or after she met John without recognizing him?

...at any rate, I can see your interpretation of the three personalities, too. Though it brings up a question: did Cameron in s1 already have free will or is this something that happened only after the s2 opening? Because if happened only then, there should be four stages, one of which would be reprogrammed Cameron.