Sample Post Appears on AMP

Hi,

I have downloaded the plugin AMP for WP – Accelerated Mobile Pages for WordPress and when I check the AMP page I can see three Sample Posts 0, 1 and 2 that don´t appear on the regular version of the site.

Please, could you have a look? I checked all posts and there aren´t any with this name.

The page I need help with: [log in to see the link]