Stunfisk, Machamp, Fighting Stadium damage assessed?

[gilpoke15]

Stunfisk(618) is active with 1 strong energy and 1 muscle band attached, I have 2 benched machamps (068), and Fighting Stadium is in play. Opponent has 1 active EX pokemon (no resistance or weakness) and 1 pokemon on the bench. Stunfisk attacks with Muddy Water. How should damage be assessed?
We ruled this way...
Opponents active EX gets 120 damage (20 from Fighting Stadium, 40 from 2 Machamps Fighting Fury Abilities, 20 from muscle Band, 20 from the base attack and 20 from strong energy.
Opponents benched pokemon gets 80 damage (same as above minus Fighting Stadium and Muscle Band)
Did we make the correct call?

 

[Walrusaurus]

Machamp's Fighting Fury Ability:
Each of your [F] Pokémon's attacks do 20 more damage to your opponent's Active Pokémon (before applying Weakness and Resistance).

Strong Energy:
The attacks of the [F] Pokémon this card is attached to do 20 more damage to your opponent's Active Pokémon (before applying Weakness and Resistance).

Stunfisk would do 120 to the Active, but only 20 to a Benched Pokemon.