Robi, if what you're saying is true and I have no reason to disbelieve you then you have a valid point. Your PN is calculated like our PY rating in that it is not formed by a mathematical formula like SCHRS or TEXEL but on actual performances/results over the water.
In the UK it is up to the Clubs to return their results to the RYA in order for the PY numbers/ratings to be accessed for accuracy. The only draw back in this method is that there is no historical evidence for new Classes and the return forms are overly complicated so many Clubs don't bother completing them.
Getting back to the point it does seem strange that your PN has been dropped to the 2up rating if the results don't reflect this increase in speed. However, think yourselves lucky here in the UK 1 up F16's are rated faster than A Classes on TEXEL, F18's and 2 up F16's on both TEXEL and SCHRS.
So although the U.S 1 up rating has unfortunately been dropped please give a thought to your 1 up friends on the other side of the pond <img src="http://www.catsailor.com/forums/images/graemlins/wink.gif" alt="" />