The 2008 generation teaching was that it was a 2000 year generation including all the anointed.
One would think that this 2008 teaching concerning the generation would have lasted them for eons without being forced to revise it.
But, the GeeBee being what it is, NOT-the-FDS that is, within a few years they changed the doctrine. Why?
I feel that there was a flurry of questions posed to the WTS about the doctrine, and that some traveling religion-mongers reported the publishers weren't feeling the urgency of the imminent end being just around the corner.
The result was a quick re-write by the writing department, and although painting themselves into a shabby new generational explanation, they are of the mind that they can always revise later what they teach today. Besides, the sheep are expected to play along nicely and accept every new idiotic supposition regarding the coming of their longed for Armageddon.