JandD Mom,
I think they just go to one -- although you might want to check and see if they'll go to more than one for an extra fee. Their website shows the main places where they go. I know Albertson's and Chamberlin's aren't listed but they'll go there as well at no extra charge. They do charge extra for Whole Foods, which is farther away. I'd go to their website for more info on what they can and can't do -- but they seem *very* flexible!
--LM