2) is about how inaccurate the value appears to be (by an order of magnitude) (0.1 Bitcoin sold in China has a valuation of $400-ish)
I see .1 Bitcoin sold in China holding a valuation currently of $276.2
That works out correctly for the current exchange rate of 1 BTC to $2762 Yuan.
Not everyone wants the dollar perspective, each currency is listed as their own.
I'm not entirely sure what you're saying here (partially because I think you're using Dollars instead of Yuan in part of your explanation).
Taking China as an example, it looks as if the USD value is too high by almost 3 times? I expect 1 Bitcoin to value at around US$400 and the CNY value to be a multiple larger than that. That's not currently the case.
It seems to work fine for US$ when a US trade goes down. Look at the Russian one - the US$ value is totally out.