Nltocan, your application sent to Ottawa is definitely not normal and I personally think it's a mistake
, did you contact them to see what's the problem? we were clarifying it earlier about the "pilot" program at Ottawa, that's how it was called before it became a fully-righted centre , US applications weren't processed there before, that's why it was a pilot program.
a canadian living abroad definitely needs to send some proof of intent of return, such as a job offer, rent agreement, a letter from your parents stating they'll support you until you're on your feet, etc.