Hi,
This is an issue in both v1.0 and v2.0. When you add contacts to a client there is no control over the order in which the contacts are listed. Adding a new contact seems to result in the contact being added at a random point in the list and the user has no control over that. Sometimes adding someone who only needs a copy of the invoice results in them becoming the first person on the list and their name incorrectly appears in all email communications, rather than the intended person.
I hope that you can improve the functionality to allow users to drag client names into the desired order.
Thanks and regards,
Mark