New items and categories in portfolio not visible

Today we have one portfolio with four categories and five items in wordpress theme Striking (latest version). When we now want to add new categories and items we cannot make them visible when publishing the item/category. We have also tried to change featured image but cannot.

The link to our portfolio is: http://www.tangden.com/wordpress/chefsutbildning/smorgasbord/

Ideas are most appreciated. Best regards Anders and Helena

Have you spoken to the author of striking or left a comment on the item page for striking?

You can contact the author through his profile: http://themeforest.net/user/kaptinlin

Thank you! We will do that right away. And thanks to the link as we had not found it ourselves.