On the current Box Score, Hall only received a 10-min Misconduct.
If a player is involved in a fight with another player who does not engage in the fight, then this situation is defined as a "1-man fight" and when this occurs, the offending player is automatically assessed an Instigator. The Game Misconduct is as a result of the Fighting Major as all Majors come with a GM. He also received an additional GM (likely for mouthing off at the Ref, bench, etc). So... Instigator is 1 Game, Fight is 1 Game and the second GM is a game for 3.
In a 1-man fight situation, like above, but the 'attacked' player defends themselves by pushing back, but does not through any punches, then he is assessed a Roughing Minor penalty. This will counter the 2-min Instigator and will give him a 2-min rest in the box while his team still gets a 5min PP. This is what you normally see as it's rare the attacked player completely disengages or 'turtles'. It's easy to assess for the Ref and it avoids the dreaded 7-min penalty on the clock.