Charlotte Marie Pomeline Casiraghi (born 3 August 1986) is the second child of Caroline, Princess of Hanover, and Stefano Casiraghi, an Italian industrialist. She is ninth in line to the throne of Monaco. Her maternal grandparents were Rainier III, Prince of Monaco, and American actress Grace Kelly. She is named after her maternal great-grandmother, Princess Charlotte, Duchess of Valentinois.
Charlotte Marie Pomeline Casiraghi has three older biological sisters
It is incorrect because it states she was the second child of her mother, so she could only have 1 older sister max. The system is confused because it doesn't recognize the "second child" meaning