Did you copy the order type or you define the new with out copying ?
If you had copied the order type with ref to other then system automatically assign the all settings which you mentioned in your case the same thing would have happened check once ( OVAO, OVAM, OVAN and OVAZ.
If you had defined new order type with out ref then system definitely through the below message no v1502. You can not create the order with out the above mentioned settings.