Search Results: warning signs

I'll start with a short version of this question for those who don't want all the details, and I'll fill in the details at the bottom in (___) for those who actually do want to read all that. What would you guys do in this situation?

Short version:
So I've gotten to know this girl over the course of a month and when I recently asked her out, she accepted enthusiastically and gave me her phone number... BUT, she proceeded to give me this warning and I quote:

"as long as you're cool with the fact that I'm working things out with my ex-boyfriend--it's complicated".

Is she pretty much telling me she isn't interested in me and I'll never have a chance with her? If so, why would she give me her phone number then? Should I continue pursuing her or would this just be a waste of both our time?
Ladies, have you done this to any guys?

(Here's the long version/ details to put things in context:
I had gotten to know this girl fairly well over the course of a month; I didn't just ask her out all of a sudden outta the blue. I made sure I got all the positive signs that she liked me / was interested in me first; the smiles from across the room, the flirty hugs, the fact that she would go out of her way to come over and say "hi" often and try to start a conversation, etc.
I was finding myself increasingly attracted to her the more we talked and got to know each other as share a lot of similar opinions, interests and hobbies.
I was starting to noticing all her great qualities I felt would make her an amazing girlfriend. And I honestly felt that she wanted me to ask her out.
Anyways, before asking her out I wanted to make sure she was was available and she had said that she recently broken up with a boyfriend. So I thought okay, she doesn't seem too emotional about it, so I'll ask her out for a casual lunch to start things off and to might delight, she accepted and seemed excited about it... until she dropped the EX-BOMB. My immediated thought was just WTF.