because it was a A Rank. He put "Super" for emphasis on how important it was. If you remember, the mission was originally a C rank (I think) because the grandpa was low on money and hired them just as escorts. They didnt know they would encounter Zabuza, Demon Brothers, Gato, and Haku, which, in turn, has the relevance of a A Rank mission. And I am pretty sure Kakashi says that. As for Kabuto's cards, he would only have the official recordings wouldnt he (the C rank mission)?