Already-published "Drafts?"

On the Posts page of my blog, at the top I see “Drafts (2).” Clicking it shows two “drafts,” both of which have already been published (one on 2011/07/11).

I thought Drafts were unpublished posts, so I don’t understand why two published posts are showing up in “Drafts.”

Clicking on one of the Drafts, I see an option to “Publish immediately” on the right, but not to mark it as already published.