At the top of the page are the options for how you want the coins displayed. There's number of coins per page: 10, 20, 50, 100. If you select any of these options then Numista remembers that, and any country you visit after that will have that amount of coins per page displayed.
The "order" has the options "face value", "date" or "reference" If you select "date" or "reference" then Numista does not remember your choice and the next country you visit it will slip back to the default "face value" Even if you go back into the original country that you selected one of the other options for, it reverts back to "face value" I would like to see it remember your preference for this option as well.