I really think they used the list as "suggestions" rather than "the one with the most votes (Rock & Roll Part II excluded) definitely gets played." While I don't know about a total conspiracy, there is no way in hell you can tell me that that Monster Truck song was the top voted song during the period between the Ranger and Canucks games, when the vast majority of people I've seen had never even heard of the song or band before. I'm a hardcore music fan, and even stuff I don't like I'm at least aware of the existence of. I had never heard of the song or band before the Canucks game.
I think most likely they had their three choices (or at least general ideas), and it was going to take a groundswell of support for one or two songs to really change that, which didn't materialize the way we on NJDevs and Reddit and wherever else really thought it would.