Artcle module showing not only the subcategory list, but even all articles

I've upgraded in a test site my 4.5.2 drupal site.
I've solved all the problems except one.

I use the article module to display the categories and the articles in the site.
Now, in the pages previously displaying only the subcategories have appeared even the articles title.

An example
Before the upgrade:
http://www.semioticamente.it/versus/?q=article/numeri+della+rivista

After the upgrade:
http://www.semioticamente.it/dummy/?q=article/numeri+della+rivista

How can I solve the problem?