Hi,
I downloaded the data for Sweden and it seems that the file with Admin1 codes has a small error for administrative area with code SE.27 which should be 'Skåne Län' (instead of Scania that is an alternate name. Geonameid 3337385).
Also 'Västra Götaland' (SE.28) should be 'Västra Götalands Län' for consistency.
Are the files with administrative codes not generated from the main geonames database?