Merciful Trophy Stats Required

After I have killed Runt, my counter is:
Enemies killed: 2
People killed: 1
I get two ‘enemies Killed’ because in a secondary mission (to steal armor from the Cumans) I killed one of the hounds that took care of the camp.
Did I screw it up? Or should I just look only at the stat of people killed for get the trophy? Thank you.