Not sure what you mean about picking up at port either. This rental company is in the ft Lauderdale airport car rental center. You can rent online or at the center. However, you select what ever car you want from the car class that you booked. All the cars are lined up with keys in and you chose the car you like in the class that you paid for. As stated from another responder, the picture online is only a representation of what they may offer.
I woul call almo they can help.
Your question is not clear to me. However, when booking a car online, the vehicles you see only represent the class. Occasionally or coincidentally you may receive something similarly to the picture of the vehicles you are interested in. The other part of your question I'll leave for you to give them a call.
Thanks! Your answer is awaiting moderation.