The message Scottrade sent me after cancelling my BBDA buy orders said: "An open order for symbol BBDA has been cancelled on your account due to a stock split, reorganization, delisting or name/symbol/CUSIP change." Nothing about PPS or volume spike. Take your pick: 1. Stock split 2. Reorganization 3. delisting or name/symbol/CUSIP change. 4. Scottrade deliberately sent out false information to investors.