Hi @roskodan,
Filters and searches are handled entirely differently the XenForo platform. @HF_Ryan would be able to possibly give you more information.
With regard as to the root category, Classifieds will show everything. Its only when you go to sub-categories will it narrow it down for you to the specific category. Unfortunately, there's only so much we can display in Grid Mode, for example. If something interests you, click on it, and you can see the category in the breadcrumbs.
Filters and searches are handled entirely differently the XenForo platform. @HF_Ryan would be able to possibly give you more information.
With regard as to the root category, Classifieds will show everything. Its only when you go to sub-categories will it narrow it down for you to the specific category. Unfortunately, there's only so much we can display in Grid Mode, for example. If something interests you, click on it, and you can see the category in the breadcrumbs.