Thanks, but that's not it either.
I have tried pretty much everything I can find in " Configure your desktop " with no luck.
To be a little more specific, moving the mouse pointer anywhere but strictly within the boundaries of the window in the corner marked with an "X" causes this - technically it's probably a feature that is of use for another feature I don't use.
Even a slight movement past the outside of the "X" causes the windows to shrink, rearrange themselves, and require an extra click to regain focus of the window I am trying to close so I can close it.
If you move the mouse pointer with accuracy, and do not move past the boundaries everything works fine.
Retraining gray matter and new glasses are functioning as a work around at this point.
But I would really like to turn this ( to me ) useless feature off ...