Mobile Ordering with DDP and two Rooms?

[osu5172]

Traveling this summer, with DDP and my parents, myself and my 4 kids. My parents are not tech savvy at all. They both have issues figuring out their phones on an average day and my kids don't have their own phones yet. So I will be doing all the mobile stuff lighting lanes, etc. This includes the Mobile ordering for food. Since we are split in two rooms, how will I do that will have to flip between reservations? Both Reservation #'s is saved/under my name/log in on my Disney experience app. Or will we just not be able to Mobile order? will we have to wait in line for food every time? Or will since they are all under the same log in will all the adult credit combine, and all the child credits combine into two large numbers? I have gone to Disney several times but never split the party over different rooms.