I don’t know if it’s you, @supermathie , who made the correction, anyway thank you very much to whoever did it. 
BTW:
Before replying, I made 2 bookmarks, one for the post, and one for the topic. (i don’t know if you can see them.)
I don’t see any difference between them.
Depending on how this feature have been designed:
- either I should see a bookmark for a post, and another for a topic, even if they point on the same place,
- or when I clicked to make the 2nd, it should edit the 1st instead.
I guess you are testing new features here, before making them available to other places where Discourse is used.
Well, take a look also at synchronization when making bookmarks using keyboard shortcut instead of bookmark buttons.
Thank you very much, again.