No, it works... On my site I deleted everything when working on the 1.0.4. release and just forgot to turn the cron back on...
http://www.vbclassified.com/sr_class...y&categoryid=2
The same applies for the wrong category counts... I was doing development work on that site in the past so I am sure I just changed something in the database. The script has a option in the AdminCP to rebuild the counts.
Now, there is a BUG in that times should say closed when the ad is closed and I will fix that in an update soon... Also note the cron does run on the hour so it is possible to have negative times (just not that negative!)
Now, closed ads do remain in view and I will be releasing a cron file for this script soon that will remove the expired ads from the database (along with the uploaded images).