Confusing that big Search box does not search the content one has navigated to. (Help > Online Handbook)

I always find the following feature confusing and frustrating: Help > Online Handbook: The target page shows a giant Search box at the top of the screen, which doesn't search the contents of the content I just navigated to. Yes, inside that box are the words, "Search for Sheet music", but there's still the following problems with that implementation:
1) The user, searching for a Search box, has his/her eye naturally drawn to the big Search box at top, not to the little magnifying glass, which is way over to the right.
2) The User, working quickly and efficiently in the Editor, has come to this Handbook wanting to quickly and efficiently find help in the Online Handbook. So again...see #1 above. And he/she doesn't really register that the search box shows, "Search for sheet music"-- They just see the word "Search" in there so it "must" be the search box for the Online Handbook. For me this just leads to frustration.

BIG QUESTION: Why is there a sheet music search box at the top of a page with content "Online Handbook"? I suggest the BIG search box searches the handbook. And move the small magnifying glass to a separate general MuseScore panel on the right. Confusion gone.
Thanks 🙂