LMinter

Thank you all for your input.  You helped me find the problem.  From your answers, I got suspicious that every spurious TOC entry had an odd page number, meaning they were all on the right side of the page.   I had set up the Master Page with the Section Name on the right, giving the field the Style needed for the TOC.  When I went back to the Master Page and removed the Style assigned and updated the TOC... voilà.  Perfect!  Again, thank you so much. 
Larry

Thank you all for your input.  You helped me find the problem.  From your answers, I got suspicious that every spurious TOC entry had an odd page number, meaning they were all on the right side of the page.   I had set up the Master Page with the Section Name on the right, giving the field the Style needed for the TOC.  When I went back to the Master Page and removed the Style assigned and updated the TOC... voilà.  Perfect!  Again, thank you so much. 
Larry

Hi LMinter

Welcome to the forums :)

The red 'X' is an option to cancel the download, suggesting that the download is in progress. The white outline around the image gives you the download progress.
 
When it finishes you can open the image clicking on it.

J