There's nothing wrong with the URL, I can load the page several times in a row and sometimes it will jump, and sometimes it won't. I've turned off ad blocking and pop-up blocking.
It jumps to just below this mysterious box:
To be fair, with ad blocking on, I had assumed that this box was a missing ad. Now, I have no idea what it is. The mouseover reads "Run script "no opt()."". Clicking on the small link in the left hand corner has no effect.