Mini Jeep and Beach Excursion with Celebrity

[ali07]

Has anyone done this excursion and how do you book it? Online it says it is sold by the car but when I booked I paid for both of us. I call shore excursions and they said that is correct, it is per person. I did buy a similar excursion once before and it was sold by the car (when you booked, you specified the driver's name). I just want to make sure I'm not paying for two cars. Thanks for any help or other knowledge about the excursion.