Games : What is the significance of "Wrong Number" in Hotline Miami 2?

What does the name "Wrong Number" mean in Hotline Miami 2? What is the significance of the phrase, in terms of the plot and storyline?

I've seen a bunch of theories out there, including one saying that the ending of Hotline Miami 2 is not actually part of the real timeline (due to the split timeline in HM1). So why use the word Wrong Number?