Explanation of Ramban - 1) 6:10, 9:18, 10:21 - debate between Rashi, Ibn Ezra and Ramban about the birth order of Noach's sons and debate between Rashi/Ramban/Rav Saadia Gaon versus Ibn Ezra about who defiled Noach (Cham or Canaan) and 2) 9:26 - Ibn Ezra and Ramban on the curse of Canaan.