filters & Subcategories

-- url of the page with the problem -- : forsalebycontractor.com/equipment
-- HikaShop version -- : 3.5.1
-- Joomla version -- : 3.8.12
-- PHP version -- : 7.2.10
-- Browser(s) name and version -- : firefox 62.0.2

this is more of a "how do i" and not a problem. We are using a module to display all hikashop categories and subcategories as a list. works great. we have a filter set on the sub pages to "refine" the search. the issue is that once we get to a sub category page and start to "refine" the search with a filter, it doesn't seem like the filter knows where were are in the nav tree. meaning, if we "refine" by manufacturer we get items from all categories, not just the sub category we are in. I'm sure its' a miss-configuration on my part.

also, on same site/page. how do i get the "filter" button on the same line as the input box? any guidance would be appreciated.
please advise.