Originally Posted by flyerCO

Did you purchase or pull up his reservation while logged in as you? If so it'll add his reservation on the app to your list of bookings so you can manage/view it.

When you login as him on same device it stores his bookings. Just like it stores them when only one person use the app. What I'm not sure of is does it only do that if he's the last one to login in, or does it regardless of who logged in last.