Lighten up, Francis. Deleting closed classified ads probably ranks right up there with categorizing navel lint and shaving the cat. I'm sure they'll get to them soon. Sorry if I got sand in your pucker.
It's because human beings are the ones doing the deletions- and we don't have a mod assigned to sit on the classifieds 24/7/365 to wait for someone to close out an ad, and sometimes, darn it, things get missed.