Page dissapear

Hi, good idea this plugin but look at this page in his category, the page appear then disappear. http://wp-infinity.com/category/demarrer/

Also the page does not show at all on home page (blog called via a shortcode from avada): http://wp-infinity.com

Any solution ?

Thanks

http://wordpress.org/plugins/pages-are-posts/