Ever since the character Naanda was revealed in the two early TLK scripts and the TLK Blu-Ray, I've noticed something odd regarding the fandom's take on her. It seems like 99.9% of the time, she is described as Sarabi's sister.
The reason I find this strange is because she is just called Sarabi's sister in one of the early scripts (the Jaunary 1990 version, which also seems to be used for the caption of the storyboard art that Naanda appears in). In the May 1990 script, she is only described as Nala's mother, and she is Nala's mother in the January version as well (this makes it especially odd when Naanda and Sarafina are depicted as two separate characters in fan art).
I was just curious as to why nearly everyone tends to call Naanda Sarabi's sister. Is it just a lack of knowledge about the character or some other reason?