I'm sorry, I forgot to mention that I am on a VPS plan: the Debian Linux plan. I think it's also called the Linux Virtuozzo Base Plan.
Is the same Control Panel used for both VPS and Shared Hosting? If so, then it might explain why the Shared Hosting articles are showing in the VPS "Getting Started" section.
Clicking the "Billing" tab logs me out when using most browsers - including Firefox, Opera, Chrome, and Safari. It doesn't happen when using Internet Explorer. Also, Internet Explorer opens it in the same window (not a new tab or window).
Basic Linux Hosting on classic platform; Parallels Plesk Panel 10.3.1