If userA signed up himself and users B,C & D at a time.
Later userA calls the site admin to cancel userB signup and requests a refund, How should the site admin modify the order so that the system doesn't cancel other users signups(userA, C & D) and also doesn't screw ubercart sales reports?
what should be the order status?

If an event costs 10$ and userA paid 40$ to signedup A, B, C & D
now userA wants to cancel userB and get a refund of 10$
if siteadmin modifies in the order payments tab, the balance will be greater than 0$ and that will mess things i guess

Best Practices?