auth.net declines and sessions

Im having an issue with Auth.net payments.

Whenever a customers card declines they typically go right back in and try again.
if the order happens to succeed this second time the orders ALWAYS ends up in the missing area.
The card is approved in auth.net but for some reason, because of the session perhaps, the order doesnt get marked as processing - its gets marked as cancelled.

is this a known issue?
its been happening to me for a while, several version of OC.
currently im in version: 1.5.6.1 using the Pav_Lexus Royal theme.

thanks for any insight you can share,

Joe

need some help please...
bump

anybody have any insights?