You are correct. We got COVID on our Alaska cruise a few weeks ago. Even though I had been in isolation 3 days on the ship, I had to start a 10 day isolation once I disembarked in Canada. I received a call from the government asking when I got COVID and how I got home. I had to isolate for 10 days. Three of us got COVID and two of us received phone calls. I expect they didn't call my husband because we live together.
I received an email reminding me to stay in isolation on day 7. If I was asked to get another test on day 8, I had to do so. Failure to complete the step could result in a $5,000 fine.