Ruling authority filter - how does it work? + questions on Issuers list when searching

Hi,

I just can't figure out how I use the filter "Ruling authority" when searching for coins. It always has only 2 options in the drop-down - All and Undefined. When I select a country in Issuers drop-down and make a search and then revisit the filter "Ruling authority" - again, the same 2 options. What is the purpose of the filter then? Or how are you supposed to sue it in the correct way?

Also I have a question on "Issuers" search box. It used to be earlier on Numista just a simple Country drop-down list, now we have two Polands, etc. What is it all about? If e.g. I want to search for coins from Poland or from Russia, what should I choose - the most upper Poland or the Poland below the first Poland? Could you please explain to me all these tricky things and how to effectively and easily search Numista.

What is a ruling authority on Numista? What is a country? What is an issuing authority? How do they match together? Why do we have such a complicated hierarchy? What is the purpose? Usually in coin catalogs coins are listed by country names. I would really appreciate any help and info to understand it all and start using Numista in a new "issuer-based" way

E.g. when I select Poland and Year: 1614 - I get no results as a search, why? What is the logic? What is the correct way of searching things? Another example, I want to show up all "1" face value coins for Poland 1900-2021, how do I do that? I used to make such searches with easiness several years ago on Numista but I cannot figure how to do that quickly now with the new search interface with breaking down to issuers, etc.

Thank you!

Alex

The most left Poland is like a colloquial term, the overarching category including medieval states and modern Poland (the 2nd in the list) covering issues from 992-1572 and 1916-date. The Polish–Lithuanian Commonwealth covers the gap.

For the what is what I leave it to someone with more eloquence.

Ruling authority are mos often monarchs if you don't get a list the referee simply hasn't asked them to be added.
When you select Japan you get a bigger drop-list then all and unidentified, at least it should maybe there is a bug because I also only get the two entries right now. Maybe make a bug report so Xavier can fix this.

Search: 1614
Search: Poland; 1916-date; Face Value 1

Thank you for the info and the search queries