How to tell if there's more to a discussionS

At the bottom of a discussion, it says "In reply to CVV with 1 other person," which makes me think there's more to the discussion, but when I click on it to open the rest of the discussion, I get this

How to tell if there's more to a discussionS

and I find out that what I saw was the whole discussion. I think there should be some differentiation between a discussion that shows more than what I see, and one that just opens up the replies.