I thought it might be a caching issue but when I clicked the “Delete Cache” button at the top of the page, it said nothing was cached. I will try to disable the plugin.
I did Publish the changes – they are not being saved because when you go back into the same text box, it is back to the previous text. There were no obvious errors on publishing.
One other piece of evidence, I could also not change the header image for the portfolio page, so something is going on. Maybe today will be a better day – thanks for responding.