Okay....so I think I didn't fully explore a wonderful suggestion from Blaze about the Keybindings. Since my last post, I did a LiveCD with Lubuntu and found that I was incorrect is my assessment that it wasn't happening in Lubuntu. What happens in Lubuntu is that the same keystrokes automatically take a screen shot and save it in the home folder. So, without realizing it, it does happen in Lubuntu (and I had multiple .png files there to reinforce how inaccurate I was in my previous assessment!).
I then decided to LiveCD Xubuntu, which has a Keyboard Shortcut interface. After some trial and error, I discovered that my keyboard translates NumLock-arrow and NumLock-Del combo into Print Screen. So, as Blaze previously suggested, if I modify they KeyBindings, I am thinking I will be fine. I can't test this right now as I am currently not able to log-in to that computer (another problem Blaze is assisting me with....). But I am pretty confident this will resolve it.
Thanks everyone!