Link or node lost in my site

If I try to access my site with the following link

http://hemelix.com/tutorial/    I see some text that I can’t edit at all with drupal administrator log in.

On the other hand, http://www.hemelix.com/about   gives or show me the contents for editing.

How can I access or edit http://hemelix.com/tutorial/ ?

What has been mixed up? My site is drupal 7

Drupal version: 


Source: https://www.drupal.org/taxonomy/term/25/feed