Just been looking over your site (which is cool btw) and wanted to ask another couple of questions.
First, are you talking about the My Classifieds page or the My Listings page?
My Classifieds will only show up completed sales, i.e. someone has bought them and the item has run to completion. Anything else won't appear.
All items should show up on the My Listings page, both those that are completed, those that are unsold, etc, all divided into the appropriate division.
My Classifieds appears on either of the two following pages:
dbtclassifieds.php?do=profile&action=myclassifieds
dbtclassifieds.php?do=profile
Whereas My Listings appears on the following page:
dbtclassifieds.php?do=profile&action=mylistings
I noticed you don't seem to have the second layer of menus available which would list both options, so it might be that you are arriving at a different page to what you expect.
From what I can tell on your Classifieds install only one or two listings have had a completed sale and none for one user (perhaps the one you are checking on?) which might explain the above.
Hope that's ok.
Matt