While there's currently no understanding for what "authorized" means in the context of Section 9, my guess would be that it'd be difficult to argue that the OGL v1.0 and OGL v1.0a aren't considered "authorized" versions of the license with regard to being able to "to copy, modify and distribute any Open Game Content originally distributed under any version of this License." After all, v1.0a was presumably authorized to be used with v1.0 materials, and there's no wording about revoking authorization, so why wouldn't be it authorized to be used with Open Game Content released under v1.1?