I don't understand where you are getting the idea that Nala's father was an orphan. The episode just says he fell out of a tree and was saved by the guard. How does that indicate that he isn't part of the pride already?
I do agree that it's weird Rafiki said Nala's father. I'm not saying her father was Mufasa, just that the possibility technically can't be ruled out until there is more info. I'm sure they are intending to imply that it is not Mufasa and so they had Rafiki phrase it that way to get Disney out of incest territory. x)


Thanks: 



