in my opinion, it means they can't come to a conclusion yet. they might have had better candidates than you, but they also seem to like something about you, your academics, research and so on. that's why they want to discuss your file in the next meeting. it could also mean that you have been placed in the 'medium bunch', who the school may accept, or reject - 50/50 chances. this certainly isn't a disastrous sign though. i hope things turn out well for you. good luck!