Breadcrumb navigation shows Home -> News > Show News.. 'News' is the page for blog posts and 'Show News' is the category. Somehow it's Ok.
The problem is the link in main header where it says: 'Archive for category: Show News' as it always point to the first post in particular category, and not to site/category/cat-name/
Permalink structure is /%category%/%postname%/ flushed and saved many times.
Additional question ... I saved some support threads as favourite, where I can see/list them?