Not at all...just explain at the beginning of the meal (before you order) who will be using DDP and who will not...It sounds like you will have 7 people...if this is the case you will be charged an automatic gratuity of 18% on EVERYONE'S meals...just so you are prepared. Have fun and EAT MUCH!!
We jsut got back last weekend and had dinner at Le Cellier with my Aunt & Uncle and me and wife were on the DDP and they live there and came to Epcot for the day to visit and have dinner. Just tell the host who is and are not and that's that.