I have installed an SSL (and checked with my host to make sure that it's installed correctly) and set the WordPress Address (URL) and the Site Address (URL) to include HTTPS.
When the domain name is simply typed into the browser address bar, the homepage displays as HTTP. If I click to an interior page of the site, it displays a HTTPS, and if I go back to the homepage from that page, the homepage displays with a HTTPS.
(For a while, going back to the https homepage in Chrome was breaking the display. I'm not sure exactly what I did to fix that, but that problem seems to be solved.)
Is this what I should be expecting? I thought if I reset the WordPress Address and the Site Address under Settings--General, that the entire site should always – every page and post – display in HTTPS.