User blog comment:Rappy 4187/Technical Update: September 18, 2012/@comment-954127-20120920025937/@comment-3095612-20120923083231

Just to provide more information, it appears any user sees their badges on other users' Achievement Pages. But when a User is logged in and looks at their own Achievement list, the badges and points are correct. A regular user reported he's seeing his badges on another regular user's list of achievements list, no mistake, because it is a one-of-a-kind badge only one person can get.