Are you sure there should be 2409 of them? I didn't manage to find a number. I did not download the data from the site you linked though.
It's much easier for us to fetch data from Openstreetmap since that is halfly automated. Every country that would require a special solution takes about one day of workarounds and building new import scripts.
OSM has changed from 2412 to 2311 counties (Municipalities) though.
Wikipedia seems to be stuck in 2010 with 2596 (https://en.wikipedia.org/wiki/Municipalities_of_Switzerland),
or 2352 from 2014 in their native language (https://ast.wikipedia.org/wiki/Comunes_de_Suiza
). In the later I kinda guessed what the sentence was saying by reading two numbers.
We will during the day upgrade to the latest data of OSM. I have manually tried to find a difference between the old map and the new one, but I can't find a single change. The map is too complex to compare with the eye.