That sounds right, especially for history. I don't think the GRE can accurately predict much, let alone your ability as a historian. I would think that it plays a minimal role in your application. Just for the record, did you receive an interview recently, or are you talking about a different application cycle? If so, what subfield(s), school, and when did you hear? Congrats!
Yes, I guess that makes sense. Nevertheless, studying one over the other will be completely different. Philosophical readings, as you know, are usually not, well, anthropological. Either way, best of luck to you in your endeavors. Let us know how the application cycle goes for you.
Why are you applying to two totally unrelated fields? What are your academic interests. For philosophy programs, you need to have a solid background in philosophy to get into a top program.