While browsing What is Hermione Granger's ethnicity?, I was surprised to see the top answer by votes wasn't accepted, when the icon in the questions list was green, indicating it had an accepted answer. I've since checked other questions and they all appear to behave this way.
I thought "maybe the OP unaccepted at the exact moment I was looking", but when I scrolled further down, I saw the accepted answer several answers down. At this point I thought it might be some weird sorting choice, but I was unable to get the accepted answer to appear at the top of the page, despite choosing all three answer-sorting options.
Isn't the accepted answer supposed to appear at the top of the answers list regardless of sorting method? It appears to work that way on other Stack Exchange sites and is hinted at in the Tour page animations here, as well.