Amazon Author Central is experiencing issues site-wide with personal author pages. Information is not displaying properly and is reverting back to older versions of the author's page. I spoke with an Amazon representative this morning who told me that Amazon is working on this.
If an author has recently made any updates to their personal profile or book pages, the information is in Amazon's system it is just not showing up on their page and may be showing up blank or showing older information. Amazon is working on this and expects to have the situation resolved in the next 24-48 hours.
If you have not yet taken advantage of this free Amazon service please read our article on Amazon Author Central. It's a wonderful free book marketing tool.