This is a follow-up to my previous post and for me resolves this issue.
My final problems with Chrome apparently stemmed from the cache. When I closed the browser and went back later, I had the proper green lock on those three pages. So. This is my recommendation for the problem of partial encryption:
Assuming that you have a proper SSL certificate properly installed, in General Settings change your site's URL to https://www.yoursite.tld. In the plugin's settings, tick the option "Force SSL exclusively" and then tick the box on the pages you want secured.
Go through your templates and stylesheets and make sure external incoming links are set to HTTPS. In my case, since I use Google fonts with the @import in my stylesheet, I had to change the urls to HTTPS. An easy way to double check for stray external links is to use the site I mentioned earlier. Once your page passes on that site, close your browsers then reopen and check again. In some cases you may need to clear your browser cache.
Mvied, thank you for a really great plugin that simplifies SSL for WordPress!