>>>The new site's map thread feature does not work quite the same as the previous site. In the previous site there were two Map Thread buttons. One would show all posts from the root/original post (like the current site does). And the second Map button would only expand the thread and show posts from the post-branch currently being viewed only. This second one is more useful imo. It allows a user to find a post in a branch and then expand from that point to find the other posts related to that section of a discussion.
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>>In Settings, in the list of checkboxes, you may check "Enable "View all messages from this thread" from the current message".
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>I have that enabled already - the behavior from previous version is different. The current Map button shows all posts in the entire thread. The previous website had a second Map button which only should posts from the current viewed post and down. For example, when I click Map whilst viewing your post I should only see your post and this one now. Instead I see all the messages from the root post.

It's worth pointing out that the "View all messages from this thread" option doesn't work as you might expect. Instead of just showing descendants on the same branch, it shows all messages on all branches that are dated later than the node selected.

The old "View map of messages from the selected messsage" did work as one would expect and was very useful IMO.