Turns out this links to a completely different URL:
Latest Threads: https://www.domain.com/find-new/threads?days=30
New Posts: https://www.domain.com/find-new/posts
...Yet they both send you to a page that show the exact same thing. The same list of threads.
Also: Right sidebar forum home page "New Posts" links properly to actual post within a thread.
New Posts link in Menu should:
1) Show a list of new "Posts", not new threads
2) Items in that list should link to the new "Post", not the first page of the thread.
Profiles differentiate content based on thread or post, so this is totally doable.
What am I missing?