problems with blog

Hello,
Big problem displaying articles in a blog page :
With featured articles, no problem. All is OK with any template width and fluid width.
But, if I want a category display,...Beurk! !! Display is not responsive and columns are superimposed, nested if I reduce width.
Same problem with the template SPARKS.
Thank yo in advance for your help

Hello,

We need to see your live link to inspect code and check what's wrong.

Thanks

Thanks
To see problem go to " voies.cer48.fr . I make the site with flat template : it's exactly identical problem.
Ckoose "services" in menu and see : my only cahange with demo is the blog by category and not featured and choice of fixed width (it's the same with fluid when reucting resolution.
Exactly the same problem with "luxury"

In menu item settings for Services menu (Menus > Main Menu > Services), please enter 2 columns. This template is made to work with 2 columns on blog pages.

Thanks