Hi undertheradar (that's where I am as well)
Yes, the 2010 understanding is a refinement of the current 2008 understanding.
Feb 2008 the generation is any anointed who see any part of the sign. (open ended, Armageddon could be 2000 years away)
Feb 2010 the generation is now a composite of two generations of anointed who overlap. (fuzzy closed ending - people can start doing generational arithmetic again)
It's similar logic to the FDS class being appointed over itself.