Hi Frank
The new DualRack topology increases the functionality of the desk by keeping Port B of the slave rack free for system expansion. This was not possible in 1.6 as PortA is designed primarily as a Mixrack to surface Link.
You are an advanced iLive user, though iLive has a wide market for professional and novice users so we have tried to keep it simple for everyone to understand. A&H decided against the software option to try and simplify the system.
You are still able to carry out the DualRack setup by moving your card configuration so that was considered as the valid option your hardware setup.
I am sorry this is not the best solution for your configuration and hardware setup.
Regards
Sam A&H