I am new to the forum and there's still a lot for me to digest.
I am interested in a few topics and intuitively add it to the watchlist. However, when I go into my watchlist I found nothing.
Later, I figure out that I can have a view of all my interested topic in the edit watchlist window. But I wonder if this is the right way to review them, I mean, I can accidentally delete them...
In my experience, when you open a post once it dissapears from the watchlist.
What I always do is to go to Profile -> Show posts, and find the post I'm interested in. This works out better for me than the watchlist.
Sometimes I also bookmark a post in my browser.