Because the Germanic tribes spread over most of western Europe during the iron age. Dutch, and North Germans are all so genetically similar they have a hard time telling them apart in Ancestry DNA and others. I have the same issue being Scandinavian descendant it really can’t tell the difference between Swedes, Norwegians, Danes and others. It generally “knows” I’m Scandinavian but the percentages of each community change every 6 months are more genetic info gets added to the database.
Interesting. It did group my sweden/Denmark together but had Norway separate. When updates come in does that mean they literally retested your sample if you opted to store it and then they notify you by email? Anxiously awaiting my husband’s results now. He started working on his tree I also have it side by side to mine and got far enough to be surprised in getting a set of the same people in our trees. Turns out we share the same 10th great grandfather lol.