[Plugin: Multiple meta_key, sort and condicional]

i have a custom fields to add position in the page, i have 2 meta keys one to know the part of the page where i will print and other to specific the order of the post.

This is my code:

$args = array(
   'meta_query' => array(
       array(
          'meta_key' =>'destacados',
          'meta_value' => 'on'
       )
    ),
    'orderby' => 'meta_value_num',
    'category__in' => $category->cat_ID,
    'meta_key' => 'pos'
);
$loop = new WP_Query($args);

This code brings me also the post that have the meta_key pos, but i want only the post that have destacados meta_key, pos meta_key and have the category that I give to the object.

i have no idea i hope tha you can help me 🙂

Thanks for reading 🙂