Population numbers in registry sets
In all the registry sets there are 4 columns of populations:
PCGS# POP HIGHER
PCGS POP HIGHER
It seems like there may be a database formula glitch in some of these numbers or maybe I just don't understand how they are defined. This is for basically all sets.
Checking a Top 100 Modern Coins Set for example:
The 1999-W $10 eagle unfinished proof dies MS PCGS coin #99942 that has a MS69, it shows 1,468 with 17 higher in both columns. For the base coin pops these seem to be the correct numbers, but for the coin including varieties If you go to CoinFacts and the population report for the #99942 it shows 1,545 MS69's and 23 MS70's.
Should the last two pop columns include all the varieties in the pop numbers for that coin? Otherwise it just seems like it is not any different than the first two columns.
National Commemorative Medals of the U.S. Mint: