Thanks for the mention, guys.
If multiple mails arrive at once (which is very common), they will form a string of pearls and be directed in one at a time by ATC.
It's correct that they can also do parallel landings at LAX.
The LAX level of 3D Mailbox should be available in August. Join now for $29.95 (for life) and get full access to LAX when it comes out.
Here are a few development screenshots (both day and night):
http://www.3dmailbox.com/images/level-2-advance.jpg
http://www.3dmailbox.com/images/level-2-advance-2.jpg
http://www.3dmailbox.com/images/level-2-advance-3.jpg
Robert Savage
Creator, 3D Mailbox