There is a lot of questions about this daily so WekizZ decided to filler most common of them. If you have any more advices please share below.
They appear always, but they wont count if you are doing the wrong FF quest line.
Source:http://forum.fedeen.com/viewtopic.php?f=90&t=1894&sid=2f8ee8a008f539c87d7850d5081e71f4