Simon:
Perhaps I could have been a bit more concise. It seems to me that the course has undergone a series of renovations followed by minor adjustments. In later years, the renovations have focused on defending the course against the increased length of the modern player. The adjustments, in general, have taken place as a reaction to the renovations. They might not occur immediately, so it doesn't surprise me that in 2012 they're making adjustments to a back-right "Sunday" pin position on 8 that was created in 1997, especially after the hole was lengthened by 20 yards in 2001. The green on 16 was rebuilt in 2001 and in 2006. 2012 seems about right for the adjustment schedule.
If the renovations are the flood tide, the adjustments are the ebb tide.
Sven