Family Finder DNA results

I wish I could get a handle on my results. I just don't quite grasp how to interpret or evaluate the information. I wonder about the accuracy of the results and I wonder about the statistical interpretation.

The traditional genealogy paper trail suggests my Dutch immigrant ancestor from the early 1600s was from southern Denmark or northern Germany (Schleswig-Holstein), but I can't see how that would generate such a large Scandinavian percentage. The Southern Europe and Middle Eastern is a bit of a surprise, too. I wonder if those are just artifacts of my ancient ancestry.