Different search results between searching the forums and forum title search.

I've noticed that when I search the forums for an issue I get different results from when I enter those same terms into the title of a new post. Is this expected behavior? Is there a difference I should be aware of.

It seems that the search results from the terms entered into the Title of a new post return items that are more applicable to my terms, but this is hindered by the restriction of only returning 10 rows for this New Post Title term search. I'd like for the forum search to function like the title search and give more results. 

I find myself using the new post button and then manipulating my search terms to get something relevant and within the first 10 items.

I also notice that the global site site from the main page does not search the forums. Is there a document or some pointers on how to properly find information.

Thanks

Moved to Meta forum.