Registry board question

KindaNewish

I only have two sets up on the registry, so I am kind of new at this, please forgive me it this is a stupid question.
I understand the first 6 columns on the registry set listings (image, item, PCGS#, date, denom, grade).
But the next few columns confuse me.
I get the 7th column (PCGS# pop) and the 8th column (PCGS# pop higher), but what does the 9th and 10th column (pop & pop higher) refer to?
Are these incorporating populations from other TPG, or estimates of old collections prior to PCGS?

To me, the 9th and 10th column numbers appear to be either redundant or otherwise useless information. Why are they there?

dbldie55

If you have a coin, where more than one PCGS number can be in the slot, the first pair are the pop number and pop higher for the specific PCGS number coin you have, and the second pair are for all possible coins that can fit in this slot.

As an example, I have an 1888 DDO FS-101 coin in the 1888 slot of my Liberty Nickel set. So the first pair of numbers are 5/1 (5 in MS65, and 1 finer). The second pair are 86/35, as they are many more non-variety coins graded, and many higher graded.

KindaNewish

Thank you

lusterlover

Another illustration is with copper coins with which I have experience as a Lincoln collector. For example, I have a top pop 1/0 PR RB coin - because PCGS perceives all RD PR coins to be "higher", the second pair is 2/64. I personally hate this as they are assuming that a PR 60 RD coin is "higher" than a 67 RB. I have never gotten a good explanation on this philosophy, but to answer your question, this is another way the columns could differ.