The Dac price is fixed on the Dacxi Exchange pending the listing onto external exchanges. This does not stop someone placing an order at a price that is different although the system will not execute the order.
This may result in the price ticker/calculator picking up the price that the order has been placed at. A subsequent trade will then adjust the ticker again. Your Crypto value may be affected by this in the short term.
Rest assured this does not mean a trade has occurred at a different price.