Hi there!
I noticed a few things about your site:
1) Youa re using an older version of Jetpack; try updating to see if that helps.
2) If you run your site through the validator here, you'll notice lots of errors:
http://validator.w3.org/check?uri=http%3A%2F%2Fwww.pennsylvaniasweb.com%2FPennsylvania_Blog%2Fadd-listing%2F&charset=%28detect+automatically%29&doctype=Inline&group=0
Some of them are unavoidable because your site is using the XHTML 1.0 Transitional doctype, but others might lead you to the cause of the issue. For example, you have at least one closing </p> tag without a corresponding opening <p> tag.