This is definitely my philosophy. If it's that hard to get something so simple, it's not a good fit for me. Although you were hyped and can understand the disappointment, look at it as a very visible look into the disorganization of the department and school. I'd move on and not look back.
If I understand you correctly that your final year GPA is 3.9 and your CGPA is 3.7, then I think you have very good chances of getting into all of those programs. As I mentioned in an earlier response, these programs (I know Munk the best, but I think NPSIA and GSPIA are the same, if not easier to get in to) look at marks first, then your personal statements and reference letters, then your work/volunteer experience. Munk's minimum average is a B+, but competitive applicants have A-, which you seem to have. As long as you can write a concise, interesting, and passionate statement(s) and can get strong letters, you are golden.
As for economics, don't sweat it too much. I got a 70 in an econ course, and it didn't seem to affect my application. You can always take it again during the summer before or during the grad programs.
Feel free to let me know if you have any questions.
For those waitlisted at MUNK, I tried calling to ask when waitlisted students could potentially start hearing back and she just shut me down by saying I would hear anytime before the end of August. So good luck to all waiting!
