Page 8 and page 1 have completely different ads on that site so I dont see how you deduce they are expired. The showcat page explicitly will only show ads which are approved. It will never show an expired ad. You can see sold ads but that does not mean they are expired.
Code:
Content visible to verified customers only.
See only when you run the sendnotice.php script would ads be moved from approved=1 to approved=2
Code:
Content visible to verified customers only.
If you want help please post your site links here and explain where on display you think something is wrong so I can assist. Given the scenerio your showing on that external site the classifieds appears fine.