A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
It appears the problem was due to my having selected the "single-click to open files" option. The solution was to revert to "double-click"". (My IT office knew this and told me).
After opening a folder using "single click", unbeknownst to me, my mouse was hovering over the file names in the selected folder. This occured as I moved my mouse from the Save As box to the OK command. There was no way to see or to prevent it.
So, the recommendation is to use "double click" to open files. (This setting is in the File>Options area).
(CLOSED).
Doug in York PA