Itachi looked like a troubled man for the first time when he faced Kabuto. Which led many people into concluding that DSM kabuto was stronger! If we look in the fighter in a more scrutiny a few points may come to suffice the reasons the battle roamed in the way it did!
1. Nagato sense Kabuto's Location and Itachi made use of that opportunity by formulating a plan of stopping him. He knew he was being controlled and only koto could help so he must go with the plan of being controlled by Kabuto until he reaches the crow upon which the Koto eye was bestowed!
(so it's not a coincident that he met with Naruto in which the koto eyed crow was)
2. He broke free of being controlled (Kabuto was impressed) then after whole of the fight he went to where kabuto was BUT notice that he planned on SOLOING him! Instead he met Sasuke and had to include him, which rustled his plan!(Since sasuke was like a baby, he was the on who ruined his plans of soloing Kabuto because Itachi in that fight always wanted sasuke to have a shot at Kabuto, making him feel as if he was in the fight!)
3. Kabuto states if Itachi killed him(showing that he is fully aware that Itachi is capable of so) that wont stop Edo Tensei! Which I reach my conclusion that Itachi was left with playing mouse chasing* in this case the mouse being kabuto!
So He remains SOLO KING
1. Nagato sense Kabuto's Location and Itachi made use of that opportunity by formulating a plan of stopping him. He knew he was being controlled and only koto could help so he must go with the plan of being controlled by Kabuto until he reaches the crow upon which the Koto eye was bestowed!
(so it's not a coincident that he met with Naruto in which the koto eyed crow was)
2. He broke free of being controlled (Kabuto was impressed) then after whole of the fight he went to where kabuto was BUT notice that he planned on SOLOING him! Instead he met Sasuke and had to include him, which rustled his plan!(Since sasuke was like a baby, he was the on who ruined his plans of soloing Kabuto because Itachi in that fight always wanted sasuke to have a shot at Kabuto, making him feel as if he was in the fight!)
3. Kabuto states if Itachi killed him(showing that he is fully aware that Itachi is capable of so) that wont stop Edo Tensei! Which I reach my conclusion that Itachi was left with playing mouse chasing* in this case the mouse being kabuto!
So He remains SOLO KING