I've hit "unwatch" on the thread that I was involved in but even though I'm not watching it I still get notifications for it. If I make a comment in a thread am I forever to receive notifications on it unless I go back, find my comment, and delete it?
If you're talking about email notifications, you'll need to click "notify" to disable it or do it from
this page.
If you're talking about the "Show new replies to your posts" page then... All of the topics that you've posted in will appear in that page when there's a new post even if you are not watching them. The
Watchlist however won't show threads that you're not watching.