I think I came across a bug when I beat the game. I got the credits and I thought I unlocked post game content but then I got roped into a side story that involved Ishgard and their king but after I beat that side content the credits rolled again. I thought "Huh, that's weird." and then after the bugged credits finished, the side story had more quests to do! Is there a reason the game keeps false flagging me into thinking I beat it by adding the credits in the middle of the story?