Actually no she hasn't made it clear AND followed through on that clarity at all. She'll tell the girl she's not her thing then when the girl messages her again she'll not only respond but get in a whole conversation deal again. That's not making anything clear, it's not cutting anything off or even setting limits, it is engaging and leading on.
Face it, she likes emotionally toying with the chick and she won't cut her off because then she'd lose her play toy and along with it the feeling that she's still "all that" because somebody out there might do stupid weird shit in an attempt to be with her.