Whoa, something must have gone seriously wrong here (in terms of answer ordering). Or did I miss something?
It looks like you're probably viewing the answers sorted by post time, per the "oldest" tab. I guess you were expecting to see the "votes" tab view.
Note that like the sorting tabs on tag pages, the tab selection for answers is preserved across page views, so if you switched to the oldest tab on a another question that view choice would have carried over.