I had the same issue coming through Vancouver customs 2 weeks ago. I've been studying in Australia and I come home once or twice a year, and I've been filling out the card as a resident of Canada. This time the agent scratched out what I filled out, and put me in as a "visitor". I didn't want to argue with the agent, so I didn't end up saying anything.

The thing is that legally speaking, I'm a Canadian resident because I'm not a real 'resident' of any other country. In Australia I am considered a "temporary visitor" for purposes of study, and that is how I fill out my Australian entry card. So if Canada is saying we're not residents, then it kind of means we're not residents of any country.

My good friend (Canadian as well) is also studying in Australia, and one time when he came home for a week's time (also through YVR), an agent actually yelled at him and stamped his Canadian passport saying he was only allowed to visit for 7 days. Now that's even more ridiculous than the current issue.

I just shake my head at these situations sometimes.