Hello,
There were coins minted by Polish King Władysław IV Vasa when he was also a Tsar of Russia. Such coins were listed in Russian catalogues as Russian coins (Kleščinov-Grišin), in Polish catalogues - as Polish coins (Kopicki) with different logic...
On Numista, previously, they were listed also under both countries but later someone decided to move a part of coins from Polish to Russian category and this created a mess… Now it looks like this: 4 coins that were in Russian catalogue previously and the 2 coins of the same types with the headings in Polish and different referenses, while PLC catalogue still have one similar coin.
I'd propose to return these 2 coins back to Polish–Lithuanian Commonwealth (with a correction of spelling of Moscow and links to each other):
https://en.numista.com/catalogue/pieces96516.html
https://en.numista.com/catalogue/pieces96517.html
This would be easier solution and would save a logic of Numista catalogues for Russian and PLC coins that were created according to national catalogues (Kleščinov-Grišin and Kopicki).
If someone think that it is unreasonable, then this coin shall be also removed from PLC catalog:
https://en.numista.com/catalogue/pieces257531.html
And Russian Empire part of the catalog for such coins shall be adjusted with the same logic (by Kleščinov-Grišin, with similar headings and page structures), duplicates shall be removed, Kopicki numbers shall be added as a second reference only….