I think I know what you mean. This happens in 2 cases:
a) While you are writing something in the editor, meanwhile someone else posted a new message and it tells you that there is a new post.
b) While you are in a thread or conversation and those span multiple pages. And let's say the thread is 9 pages long and you are currently on page 2. When you use the editor on that page, let's say because you quote someone, and then post the message, then the message you posted is directly under it. But since the thread is 9 pages long, it can't be that your post is under the 2nd page, you just used the editor there.
So when you click to "view them" it redirects you to the last page where your message is.
You used the editor on page 2, it reminds you that there are more posts to display between page 2 and page 9.