I posted a personal finance management series and opened one of the pages, just to see it live. I clicked on an embedded link and it went to a locked page. I recognized the locked page. Long story short, the links I used were to a version that was dated in June 7th. I scheduled the pages to launch on June 12th, thus, apparently, changing the URL. Hence, I had to manually update all the embedded links.
Drupal is smart enough to know about a title change and direct the person accordingly. Heavy sigh. Another lesson learned about WordPress.com.