Does this girl think I'm an idiot?

This girl is desparate to talk to me or something because she made up an alias fb name and I thought it was the girl that I was trying to ask out, but a couple weeks later she changed her alias name back to her old name. Like was she tryin to see if I would crack and talk to her? It made me feel creeped out. Could she be mad because I asked another girl out? and did not call her to end things properly? Is this normal for girls to do on fb?