"1. the correction is not applied to the acceleration, its applied to mean sea level which is where the acc is also applied to predict. How can the correction be of the same magnitude (from GIA link) as the the acc (from wiki link)."
Not sure what you're saying. The correction is not relevant to the acceleration. It could be 100 mm a year.
"2. I provided the link for all my numbers. the calculated and observed levels are from the wikipedia link. thought it was obvious as I included the entire text to go with the numbers."
As I remember your (wiki) numbers were only up till 1990, and were based on modelling. There is a bind here, as the correction should be applied to all numbers. However, at the magnitudes you quoted the correction would be greater than the error. However, as I see it as long as the error in the correction value itself is small, it could be applied anytime.
The numbers I quoted were up-to-date, so it would seem that the rate of sea level rise is increasing.
