the reason for one sheet and the strong tape to hold it in is to prevent vapor from destroying the door cards and also sogging up the interior. Multiple sheets with holes will leak vapor into the car.
How hard is it to remove the plastic and reapply it? I find it very easy.
I do hope you took the equal money for the plastic sheet from his charges because he actually cut n ripped your original item. Either that or he installs a new item.