How/Why are there two different "Post Of the Day" for the same day?

On Amirite's home page, the "Post Of The Day" is the question "Do you suffer from pistanthrophobia"... and you can still vote for it as the "Post Of The Day" in the future, so I'm guessing that's NOT THE OFFICIAL "Post Of The Day". While under the "Post Of The Day" link where there is a different "Post Of The Day".