Yes I am thinking the same as you--that if she doesn't know whether she'll be leaving the country soon, she doesn't want to start getting involved w/ someone even if she did like you.
Hmmm, it sounds to me like she's not interested. Sorry. The fact that she said she hoped to see you at a future event, rather than make a date is pretty telling. I think she's just being nice. Even if she were thinking of leaving to take another job, if she were really interested, she'd go out with you and worry about how to make it work later. I also think the ADD excuse is pretty bizarre...maybe she was just being funny?
Speaking from a woman's point of view, if I were interested in a man and was too antsy to sit through a movie, I would've suggested another activity. If my plans of moving or not were unsure and I was interested in a man, I wouldn't let that opportunity slip through my fingers and would definitely date him. My take on it is that she's unfortunately not interested. I would extend my energies toward someone who gives you more inviting signals. Good luck.
Well, lets just hope that she likes me but doesn't realize it yet (smile).