Maybe, just maybe, she picked up on the fact that you're after her simply because she's hot. I hope you're just talking this way online. People can sometimes pick up on the vibe of "man, he's hot, who care's about the rest?"
Write her off. She's gone. It's not fun playing those games, or being left wondering whether she will call you, and having that kind of uneasy feeling that those situations can lead to. Spend your time having fun. If you have fun with the second girl just have fun, and don't think about the PT as much as that is possible. Later if might be funny to make her think you are insane. Wait for about a month and then call her and leave a really excited message about how you got just tickets to see David CAssidy from the Brady Bunch give a lecture, and that you can't wait for it. Since they are super hard to get and you have an extra one, tell her she is in luck. Ask her what time you should pick her up for the David Cassidy lecture. Then say that you've saved the best part for last. You've heard rumors that Shirly Jones might make an appearance. If the machine hasn't cut you off yet, tell her the guy that got you those tickets might be able to get you some tickets for a Ricardo Monteban lecture next month, but you can't promise her one this early.
I think both sexes play their own share of games. I know that I do from time to time as well. I blame it on the female though - you sometimes HAVE to play a game of your own to combat her games. Not always though - if you are confident and don't really care what she thinks of you, you can break her frame and her game-playing reality and bring her into your own reality. From the looks of it, most people would probably say she's not into you THAT much, but you can never 100% know whether she is playing a game or not. I think the best thing to do in that situation would be call her on her BS in a confident, secure manner. If anything, it will say to her that you respect yourself enough not to put up with dumb games. I could go on and on here, but most important things are to be confident and value yourself more than the girl.
I'm married, so I don't even know about dating anymore, but there are a couple of points that occured to me while reading this thread. I think expecting candor from a first date is even less reasonable than expecting sex. I don't think people want to deal with potentially heavy emotional confrontations with people they don't know very well. It's not playing games so much as protecting yourself. First date blow jobs are comparatively easy! As for the good guy/bad guy thing I think there are a lot of guys out there who label themselves "good guys" because they mean well. Too many of them still come across as bitter little ninnies for all of their "good" intentions. If women aren't attracted to passive-aggressive insecurity who can blame them? I don't want to just pick on guys...I know all kinds of women who have years of therapy before them, too. My advice to anybody who is looking for The One is to stop looking and relax.
I agree that expecting candor from someone face to face right at the end of the first date is unrealistic. Having to tell someone to their face that you're not interested is a very traumatic to do. The key is to realize that people act flakey and weird, vague and unclear is that it is for their own "selfish" benefit, it is not for your benefit of letting you down "easy". I'm not criticizing that but this is probably one of the biggest misunderstandings. Lots of people say it is better for the interested person to know in a straightforward way rather than be let down "easy". But that is not why the other person is behaving that way. It is a lot more uncomfortable for the other person to be straightforward than to be "vague" even though it sucks for you and you'd rather they be more candid. But this is just human nature and has to be understood and dealt with.