Looking back at the original video, it appears to be the SUVs that John Wick blew up via remote explosive that get missed.
According to director Chad Stahelski ,in an interview with Empire, John Wick is even bloodier than we thought, and we weren’t sure that was possible.
So there are apparently eight other people who lose their life because one idiot killed a puppy.
We only see two people get caught in the explosion of the three cars, but if there were more people in the cars then that would explain where the additional eight foot soldiers came from.