For further clarification, I use the “force rewrite” option in “Titles and Metas” section because otherwise my titles get all messed up. It appears that for pages where I’ve specified a Page Title, Google displays PAGE NAME – SITE TITLE. This includes the Home Page, which is displayed in search results as SITE TITLE, since there is no page name for the home page.
Pages where I leave the SEO Title field blank appear fine.