[Plugin: WordPress SEO by Yoast] : Unable to post blog entries on "Blog" page

Hello.

My problem is the following: since I’ve activated and configured this plugin, I have come across an unexpected conflict.

This is the demo of my theme.

If you take a look inside the indexed categories of the scrollbar “portfolio”, they present a visual appearance like this.

And the blog presents this visual appearance.

The theme in origin (and if I unable the WordPress SEO by YOAST) index the entries under the category “Blog” in the page with the same name, and you can see the read more buttoms, the sidebar, the search bar… but with the SEO by YOAST enabled my wordpress put the entries in a category called “Blog” with the same format of the rest of categories (no sidebar, no read more buttom ….

Thanks for read this. Any Any help or suggestions will wellcome.

Diego.