Oooohhhh!
I understand now!
She's actually dumb as fuck!
See, I thought she was something like a genius at everything, from how she's described by the story.
But she's actually completely stupid. That makes the last few chapters a lot more logical then.
I mean, if you want to hide that you actually are Charlotte, maybe stop hiding and running away every time you meet someone who knew you in the past... way to appear even more suspicious...