keesiemeijer on "WP-PageNavi Error in last pages and extra pages?"

Ok you allready have something similar in your functions.php. Try changing this:

if(is_home()){
      $query->set('posts_per_page', 1);
}

to this:

if(is_home()){
      $query->set('posts_per_page', 10);
}

And remove the query_posts in your index.php