bjherbison
Does the result eventually show those coins? If so then it's working as expected.
It would be nice to have Display Options order by reference extended to select a reference.
Yes they are shown eventually on other (multiple page search results) pages, but not before all kind of other hits are included (some also with no selected reference). And still once again, If I have selected country and reference, then these two parameters are to be expected in the search results only (and nothing else). I would also expect the search results to be displayed by "increasing" reference number order (even if selected reference is placed on any other spot on coin page not equal to first spot).
Here is a case of this, country=Slovenia, reference=Schön, display by reference:
https://en.numista.com/catalogue/index.php?e=slovenie&r=&ct=coin&im1=&im2=&tb=y&tc=y&tn=y&tp=y&tt=y&cat=y&ru=&ca=377&no=&v=&i=&b=&d=&u=&a=&dg=&m=&f=&t=&w=&mt=&g=&se=&c=&wi=&sw=
As you may see, search results do not show only “Schön” reference, as clearly selected.
LP