After importing a course, module, etc, it seems that all the notifications etc. that would have been on the original class's dashboard also come to mind. I just got 28 posts to my dashboard from importing some content from commons. I'm afraid this is REALLY going to confuse students enrolled in the course I'm importing to especially if I forget to manually delete the announcements etc or make them tailored to my class. Please advise
As far as I'm aware, no, you can't disable this or prevent it. That's why if the course is live (so published and with students) I recommend importing from Commons to a sandbox (not real/live course) in Canvas. Then you can just move over the stuff you want. Yet, if you want all of it and your course has started (is live with students) then you're going to flood them with notifications regardless.