Your travel agent is not giving you fully correct information. It used to be possible for one passenger to have one kind of package and the other to have a different package. But no more. However, the exception is for medical reasons, then one passenger can have the non-alcoholic, while the other has one of the alcohol packages. So what you were told on the phone is correct. You can get a medical exemption, but otherwise, both in the room must have the same package.