Template for custom form not working
There were 2 major changes on the code above 


I changed the form name to listing_adform() 
I changed the hook_menu to call my form not theme



  $items['ad-listing'] = array(
    //'page callback' =&gt; 'adlist_template',
    'access callback' =&gt; TRUE,
    'type' =&gt; MENU_CALLBACK,
    'page callback' =&gt; 'drupal_get_form',
    'page arguments' =&gt; array('listing_adform'),
  );



Flushed the cache, and I saw my fields rendering using my template in form/adlisting.tpl.php