The opposite is true for me. As you know, until recently I could only close "keep" so I learned to check for these things. Another thing that can cross you up is that if an article is moved during the AFD period, then not only do you need to remove the AFD tag manually, you also have to move the oldafdfull tag from the old talk page to the new one because the Zman script doesn't follow redirects. Another thing to check for is this.