Hi Andrea,
Sorry for getting late to reply!
Actually in your page shortcode was wrong!
The category shortcode is different from package shortcode! The category shortcode should be something like this format
[wpdm_category id="Category Slug or Slugs" operator="IN" title="Custom Title Here or 1" desc="Custom Description or 1" toolbar="1" paging="1" order_by="field name" order="asc or desc" items_per_page="10" template="template name or ID" cols=4 colspad=2 colsphone=1]
For your issue, I have customized shortcode like below
[wpdm_category id="documenti" operator="IN" title="Tutti i documenti" desc="Tutti i documenti richiesti" toolbar="1" paging="1" order_by="field name" order="asc" items_per_page="10" template="link-template-calltoaction3" cols=4 colspad=2 colsphone=1]
Your page http://www.calciomaernefemminile.it/documentazione/ is now looking like this
I hope that will solve your issue!
If you need further help dont hesitate to shoot me a query!
Cheers
Salahuddin Ahmed