Gwyn, thank you so much for this. I did follow the link, read the article and attempt to use the debugger, which is a very insightful thing! I got in over my non-technical head for a while, but a friend helped me out.
Now the pages & posts display correctly, except for the share image when posting the link in the comments sections on Facebook. The debugger mentioned that the og: image is not the right size so I will try to fix that. If you know where I would find the setting for that, it would help me out.
Thank you!