@chrisv1963, there must be something in the way of what we are discussing that your site is doing. Just try to be really honest with yourself. Or are there possibly other sites that have been scraping your content? That's my only other theory.
A lot of sites are copying my content. I sent out more than 400 DMCAs (to website owners, hosting companies, Google Search) for copied content. On top of that I submitted DMCAs to Blogspot for more than 800 blog pages with stolen content (texts and images). I began submitting DMCAs in June and most of the copied content was removed promptly. However, I'm sure there's more copied content out there that I didn't find yet and probably even today others are stealing content again.
Google's "scraper update" did not affect my website. Actually, traffic increased after that update. Then suddenly on Feb. 24th Google decided that my website was "bad".