title: Drupal 7 some non-existing URLs are not Redirecting to 404?
body: <p>In Drupal 7, some of (non-existing) URLs are not redirecting to 404 or any error page it should. Instead, it still remains showing its Top Parent Folder. For example like:</p>
  
  <ul>
  <li>www.mywebsite.com/items/aaaaaaaaaaaaa</li>
  <li>www.mywebsite.com/items/bbbbbbbbbbbbbbbbbb</li>
  </ul>
  
  <p>Every WRONG URLs under <code>/items/</code> i put like above, are showing the Page of its parent:<br>
  <code>www.mywebsite.com/items</code> instead of get redirected to 404<br>
  I don't want its parent to be shown <strong>if there is no page really</strong>.</p>
  
  <p>But the strange thing is, it is NOT happening on every patterns. I mean, another different parents like:</p>
  
  <ul>
  <li>www.mywebsite.com/users/aaaaaaaaaaaaa</li>
  <li>www.mywebsite.com/users/bbbbbbbbbbbbbbbbb</li>
  </ul>
  
  <p>For the wrong url typed-in under this <code>/users/</code> parent path, it is CORRECTLY redirecting to the 404 page.</p>
  
  <p>What is it please?</p>