Looks like they may be updating the pages from their servers side. Few days ago I saw they sent an email that they were changing/updating their course structure.
The site has been changing a lot lately. I've been glad that Powerscore checks for updates and updates their Twitter because we don't always have time to go through pages upon pages at the same rate of the site changes.
@sarahisk Proctors don't necessarily change. They mentioned proctor changing in the video briefing before the exam, but mine didn't change. I don't think you can request to have just one proctor.