This is called inverted market.
Investopedia gives this definition http://www.investopedia.com/terms/i/invertedmarket.asp
he did not talk about the inverted value, take a closer look at the screenshot.Investopedia gives this definition http://www.investopedia.com/terms/i/invertedmarket.asp
I experience this quite often at bitfinex. But everytime I see this, it is just because the trading engine is not fast enough.
So it was like: someone want to sell 100BTC for 200€ , while there are alot orders over 200€ in the orderbook. So the 100BTC sell order is clearing all those orders. But this takes some time and for this time you can see, that the bid > ask.
But if your example takes longer than some seconds... I don't know what it could be.
