He did do that, but I'm pretty sure thats another one of those "people in melee range are only excluded as long as there are at least X players outside melee range" mechanics which in this case was no longer met because part of your group that stands at range had collapsed. Kinda like how Yorsaj wouldn't throw green globs on the melee if you had enough people at range, but if you didn't have enough people at range, people in melee range were eligible targets which isn't punishing people for being ranged dps but rather punishing those who have to stand in a certain place to let the mechanic work optimally.