Create A Forum - Support Forums

That is how it is supposed to work.   From the search box when you are at the Main Index it searchs the entire forum.   When inside a Board/Thread etc it searchs only that specific Board/Thread.   It gives more flexibility that way.   Say you know there is a specific Style in the Style Board here.  You can go into that Board and search for the name of the style and it will search only that Board instead of searching the entire forum.   You can also use Advanced Search (via the Search Link on the Menu Bar) and specify which boards/etc you want it to search.