Linking back to categories problem !!

I’ve looked around and can’t find a solution for this, it may have something to do with the plugins I have installed but anyway…

I added a main navigation to categories directly on to the templates, with – blog – articles – etc …. so from index or main pages by clicking I get..

https://localhost/wordpress/blog or https://localhost/wordpress/articles
I have it set up using ‘List category posts’ plugin to return a summary of post made in that topic or category… works fine..

But if I click in the [more] button it gives me the whole article or post.. works fine .. https://localhost/wordpress/blog/post-name but once on that page if I try to go directly back to blog or articles or any category it returns a link like this

https://localhost/wordpress/blog/blog or
https://localhost/wordpress/blog/articles in other words it does not remove the previous category..

I also have ‘Category Base Killer’ plugin, does what it says on the tin, permalinks set to /%category%/%postname%

As I’m building, I am using WAMP services, localhost, so I’m figuring I could sort it online by linking the main menu links relative to the root site, but I would prefer to keep it document relative..

I think that’s everything ??

not quite, oddly, at present I still have wp_list_categories running in the side-bar, (which I’m planning to remove) but if I use them they do not cause this problem and go directly to the category clicked.. ??

Can’t work out why it can work from the side-bar but not on the main-menu area… confused ….

Anyone able to point me in the right direction or step me through what needs to be done or have a need for a whole bunch of hair, only slightly ripped…