1- Naruto and Sakura met the sand siblings 2 days before chunin exams.

2- 9 years have passed since he broke away from akatsuki and Orichimaru trying to devour his body, which was Orochimaru's plan since he met Sasuke.

3- Sasuke thinks his brother Itachi is the real hokage for how much he sacrificed and endured for the sake of konoha's proetction from behind without anyone recognizing this nor taking credits for his heroic action, living as a traitor till his death.