How do I the widget "Recent Networkwide Posts", show latests posts?

About the widget named "(buddypress)Recent Networkwide Posts" I've a couple of problems. It seems the widget must show the recent posts of all the network in the frontpage, and when somebody clicks on the widget title, it shows a page with the last posts. Then I've two problems:

- The widget don't show the lasts posts, and it shows a message which says: "Sorry, there were no posts found. Why not write one?", but really there are posts.
- I've activated the widget title in order link to yhe last posts. the url is: http://noticias.sinoduelenovale.com/sample-page/nueva-pagina-de-test/ . Cow I could change this url name? for example: http://noticias.sinoduelenovale.com/last-post or http://noticias.sinoduelenovale.com/posts/lasts

thanks, Emilio Alvarez