Recently I have seen the popular answer of Jon Skeet on this question, I found out that Jon Skeet answer it in just 16 minutes so, to look whether someone replied earlier than Jon Skeet I sorted by Oldest and found out that Skeet answer is still at top but the fact was that Jacob answered earlier than Skeet, He replied just in 5 minutes. On finding I found out that it was by design that Accepted Answer is always remains at top.
But in this question on sorting it behaves different and it moves the correct answer to bottom by sorting answer time.