Bug report: "Expires On" Dates

So I setup classifieds on my BP site at http://www.jetprogram.me, but I think I’ve found a bit of a bug.

Please see the listings here: http://jetprogram.me/classifieds/

Both of the sample postings I put up have returned some strange “Expires On” dates. When posting them, I set them to run for 4 weeks, so the expiration dates on both should be 7/11/12, no?

Please advise. Thanks much.