While they have not formally announced it, BTC-e recently stated to me that they are no longer dealing with US banks or customers.
This would explain the lower price of BTC on that exchange as USD would be relatively more scarce there.
Why would you want to trade on BTC-e in the first place? They have no big volume, they prices are lower and they are not transparent.
It is like 2nd grade exchange there are many better services if you want to trade in USD.