I have a theory about why she's rather strange to some and not to others: she prefers older men. When a client of hers turns out to be (or look) younger than expected, she goes crazy on them and kicks them out.
I myself am 26, a bit younger compared to most punters here I would imagine.
She bid on my RB yesterday at a very attractive rate (£100ph) and I emailed her to confirm the requirements, since her profile has almost nothing on her likes list. Her response was positive. A few hours later I get a message from her, and this short conversation takes place (copied and pasted). She replied to message almost instantly.
Anna: Just saw your age. Are you 26 years old? Im older than you.
Me: I am indeed. I am aware that you're one year older, according to your profile. Why do you ask?
Anna: I normally see older clients. I am much more comfortable with older men.
I responded and thanked her for letting me know. Just thought I'd share.