Diagram Clarification - 3 health on last Warrior?

Could someone clarify how the 3rd fight between Knight and Knight ends in 3 health? When I run fight(carl,mike), it ends with carl having 1hp left.

Also, am I right in thinking that the lancer's "hit second enemy" and healer's "heal spell" don't affect other fights, making the healer completely useless in a straight_fight?