I think that we deserve to be credited with the 2007 Premiership, even if it requires an asterisk on our Premierships Won record. 9* Premierships looks better than 8 Premierships.
I was at the game in 2007 and it was a bloody nightmare. It took me ages to get over. Awesomely enough, I was at the 2008 Grand Final too, and that was one of the best days of my life (yes, it may seem weird, but I love Manly that much).
By not awarding a Premiership to any team because the other side was stripped of it is explicitly acknowledging that that year was completely pointless.
The NRL has just erased the seasons of 2007 and 2009 by not awarding the title to the team that came second. It REALLY gives me the flaming horrors!