The "clearos-core" repository is now version 6.6 (though one of the packages failed to rebuild). If you have it enabled, you will be getting the upstream 6.6 updates. It would be nice to have a public "clearos-core-testing" repository, but that hasn't happened yet. Since the "clearos-core" repo is for command line hackers only, it is perceived to be not commercially important to ClearOS Professional subscribers. Though I don't like the policy, I know that it's all balance between resources and keeping customers happy.
In a strange twist, the move back to CentOS in ClearOS 7 means that "core" (aka CentOS) updates will be handled through a more thorough QA process.