Hi johnnyc,
I think you may be confused by the fact that the Watch Tower Society is way too dishonest to admit outright that they were totally wrong about understanding what the Generation is and issued false man-made opinions passed off as the "True inspired words of God" to millions of followers who are not allowed to dispute them.
They pulled the same stunt with 1975. In 1976 you CAN'T find an honest policy change statement to the effect that "WE, the LEADERSHIP of the Watch Tower Society stated our faulty opinions and conjectures about 1975 falsly represented by us as God inspired facts and now admit we were totally wrong about 1975 or any End Times predictions we pulled out of our asses. Sorry for screwing up your lives, so please don't listen to us because we are idiots." You will never see it clearly stated this way. They would loose their authority and control of the membership if they admitted that they know even less than your average Bible reader about "God's Divine Plan". Policy changes and weak admissions forced by clear events that don't add up or don't come true are always hidden in tricky and confusing language and or buck passing so that there is no clear revelation of the monument to falsehood that the Watch Tower is.
Their entire claim to fame and authority derives from them being "God's only true spirit inspired channel on earth today" if they start admitting honestly that they don't have a clue when it comes to understanding the Bible they cease to be authoritative leaders installed by God and become just another group of men with opinions.
It is really as simple as that.