Just noticed "Unanswered" had already had some threads with replies, but it's still listed in the area of 'Unanswered". I thought it' might be the reason that i didn't refresh the page, but with several refreshes, they are still there. Here is the screenshot.
Except three threads all the others have already replies. and noticed it took more than half an hour.
My question is: Why it had such an issue? coz IMO, once there's reply following a thread, it will be automatically moved from "Unanswered". Or it's quite normal to take half an hour to be removed? Really wonder?!!! Hope i'm not a storm in a teacup! 