In multi-monitor setup, how to control which workspace a newly launched app appears in?
Problem solved! Let's say that I was not that familiar with apps that were running but had no open windows. Along with that I'd never paid much mind to my Dock (I always hid it with the Genie Effect). And the fbara comment sealed my understanding.

note: When I was messing around with the options settings for apps on the Dock, a few times I was given the choice of selecting both a default monitor and workspace. I am not sure what I did though. I can't get that choice anymore.