They could easily come up with some new wacky explanation incorporating their idea about 'this generation'.
It could go something like this - since the number was going down until 2007 we can see this would have been the first and second overlapping group of anointed but now that it is rising from 2007 this must be the third overlapping group. So we know that Armageddon must be coming very soon because the number of the second group would naturally still be going down.