You are using header with the overlap option enabled (Theme Options > Header builder > Header overlap) which means that header will be shown over the page content. So, you should either use the breadcrumbs with big padding-top (Theme Options > Breadcrumbs > Breadcrumbs type > choose some breadcrumbs) or add the banner to product categories description (Products > Categories > edit the category > add the Banner Static block shortcode) as we did on the demo https://xstore.8theme.com/demos/2/home-decor/product-category/kitchen/
2) To help you with the filters issue and we need to check your backend and widgets that you have there. Provide us with WP Dashboard and also FTP access, please.
