I think the previous poster was right. The hair may have been knotted instead of injected. I had a similar result on a piece I had repaired. The original hair is injected quite flawlessly, but the hair-adds look like that: with dark, thick roots.

If you find a way to avoid that look, please post it up, as I'm a fan of the injected skin bases and would love to have the realistic injected look again.