Project-GC does not technically support the fact that two counties within the same country has the same name. This was the fact for Switzerland. They will then in most cases be considered the same county, obviously the maps didn't get rendered like that though.
We have now updated the data for Switzerland to the latest in OSM and have added region-abbreviations to all the county names (in Switzerland). Example:
This will affect all checkers that has Switzerland county names hard coded or configured in a tag.