title: Drupal 7 Views with 2 contextual filters not working if second filter not defined
body: <p>I'm working on a job board. I want to display a view with a URL looking like /jobs/region/category.
  I configured my view with the path "/jobs/%/%". I created 2 "Content: Has taxonomy term ID" contextual filter. When I preview the view it is working correctly. When I go the page <a href="http://www.mysite.com/jobs/chicago/medical" rel="noreferrer">http://www.mysite.com/jobs/chicago/medical</a> for example, it is working as well, I have the list of medical jobs in the Chicago area. But if I go to <a href="http://www.mysite.com/jobs/chicago" rel="noreferrer">http://www.mysite.com/jobs/chicago</a>, I receive a "Page not found".</p>
  
  <p>It set the value of "WHEN THE FILTER VALUE IS NOT IN THE URL" for the second filter to "Display all results for the specified field". I also tried to provide a default value but nothing is working.</p>
  
  <p>I read several topics for similar problems but I've found no solution so far.</p>
  
  <p>Thanks</p>