WordPress fix Browsing within a category

WordPress Speed Up Service | WordPress Website Maintenance Packages

Browsing within a category, by maxid

Hello,

I’m using the Responsive theme, and I use WP just as a simple blog with two categories. When someone chooses a category, he sees all the titles in it; but when reading more about it, that is to say opening the content, then the two categories are merged. Therefore there is the full post and both the previous and next ones independently by the category. Instead, I would like a browsing within a category even after opening a single post.
Is it possible in some way?

Thanks.

Browsing within a category