I'm registering the following post type:
register_post_type( 'post', array( 'hierarchical' => true, 'public' => true ) );
Now I have duplicate "Pages" menu items in WordPress Admin Menu. It should be not "Pages" but rather "Posts".
In older versions of WordPress ( < 4.4 ) everything was alright. Any suggestions to do the same? Most important is to make my posts hierarchical.