I just received my Genographic results and I am quite sceptical about them...

By maternal line my haplogroup is J1c2 and my paternal line is R-L21. Till now no doubt, despite the geographical dispersion of these two groups.

What is puzzling me, is that the result refer 2% of my DNA as originating in a geographical area which I am not aware of having ancestors in any of the both lines.

By other hand, if I had ancestors with these characteristics in the last 6 generations, I think the percentage value would be higher than 2%.

Someone can help me to clarify this?