When an anointed individual disagrees with the Governing Body, it is not considered proof that the person never was anointed. However, should one persist in belief contrary to the doctrines promulgated by the Governing Body, upon discovery the dissenting person will then be DF'd and categorized as a member of the "Evil Slave Class". There was a Question from Readers many years ago that expressed the opinion that a DF'd anointed person could again be viewed as anointed after "re-instatement". While DF'd, the person is considered estranged from the Body of Christ, and thus no member of the "Faithful and Discreet Slave Class".
As far as the status as "anointed" being the opinion of the "Slave" -- even Bodies of Elders who by their own admission are NOT anointed are granted the right (by the Governing Body) to pass judgement on the validity of one's profession of being anointed. So one becomes officially anointed only by being recognized as such by the local Body of Elders.
The Doctrine of the Faithful and Discreet Slave is a false doctrine.