Mission \ "Everyone to the rescue! \" (Assassin's Creed: Brotherhood)

Hello comrades. This problem has arisen. For 100% you need to kill targets with recruits. When Micheletto gives the 2nd package and I call the assassins, 1 of them throws a knife and the kill is credited to me, not the recruit. The result is full synchronization in the minus. I replayed the mission and the game and nothing changed. If anyone has come across this, can you tell me what to do? Thank you.