I think I understand what happened with the website: the candidate put up his own website, but the Green Party's Riding Association probably runs ottawavaniergreens.ca.

The riding association website remains active between elections so that the local members can elect a candidate, schedule events/fundraisers, and go about their daily business. The candidate's website pops up in time for the election and then is usually discarded (unless they are elected or plan to run again).

Have fun wading through policy!