So it seems for a temporary workaround to control one the entries, as in having one NOT run, is to remove the global entry in /etc/xdg/autostart and then comment or uncomment the choice in the ~/.config/openbox/autostart.sh. Is this right?
Because the desktop files Melodie ended up with in /etc/xdg/autostart directory are different than the set I ended up with, I cannot be sure what is supposed to be there by default.
Be on the safe side. As root, make a folder in /etc/xdg. I named mine /etx/xdg/autostart-moved. I then looked at what entries were in my ~/.config/openbox/autostart.sh file. If there was a desktop file that duplicated what was already in my autostart.sh file, I
moved the desktop file to the folder named "autostart-moved".
Also be aware that the icon names you see in the /etc/xdg/autostart directory, when looking at the contents of that directory in the file browser,
do not match the actual desktop file names. While looking at the directory, use the file manager to open a terminal window. Then you can list the actual desktop names.

I would be interested in your results. I am sure Melodie will be too.