as I understand it, chocolate and orange works the same in cockers as in BC's in that a dog can be both chocolate and orange at the same time.
Orange/Gold/Lemon...whatever you want to call it, is the recessive extension gene 'ee' which results in a complete loss of eumelanin pigmentation in the hair follicles which means the dogs true colour cannot be expressed in the coat. Therefore a dog can be orange with black pigment or orange with chocolate/liver pigment. Genetically it will also be black or chocolate but unable to express it's true colour because of the 'ee' gene making it appear orange/gold/lemon.
Good luck with the BC Rachel, another very sensible choice lol