Perhaps it wasn't articulated well enough, but reversions we decided would be allowed within the 6 month period, however it would reset the 6 month wait. For example, UserA changes their username to "UserB" on June 1st, 2014. They would not be able to get a name change until December 1st, 2014. However, they get it reverted on August 1st, 2014. Now, they cannot get a name change until February 1st, 2015.
Snow Queen's recent name change did violate the 6 month rule, but only because she did it for personal reasons. To protect her own personal privacy, we agreed to allow her another name change.