Report Bug - user can update publish date of his ads
When you are posting a new ad, in second step ( ad details step ) copy the url somewhere and then continue the steps until your ad is submitted.
When the ad is submitted successfully if you paste saved url to address bar you can edit your submitted ad again and now after all steps the publish date will be update and the ad goes up in the listing ad's page.
Reason of this issue is saved hash in transients, because this transient not deleted after publishing ad process.