Bug in banknote section

It almost feels churlish pointing out bugs at this early stage but anyway, when entering an undated note which was only issued in one year, the summary of dates in the country list shows a hyphen after the date, e.g.,

https://en.numista.com/catalogue/australie-banknotes-1.html

I'm not sure if this happens for coins as well.

Not a bug you just made a mistake. You have to fill both boxes even when it's just one year.

It is a bug because the page for the note shows the single date without the hyphen. I'll repeat the date and see what happens.