Listings return to draft status every day

To get familiar with the classifieds plugin, I entered in a few test listings, and published them. However, every morning when I get up and look at those listings, they have automatically changed themselves to "draft" status, instead of remaining as "published" status.

So every day I click on the "Publish" button for each listing to make them published again, but then the following day they are always back to "draft" status again.

After I publish listings, I need them to remain as having a "published" status forever (or until I delete the listing).