So, I asked about it first in the Forum, then advise to do a Ticket, that has come back to post in here.
I only use the Quantum for Synthesizers and 2 ADA8200 8 Channel Pre-Amps over ADAT. All the inputs are Stereo Pairs, so in Logic Pro X they go Stereo Pair channels 1-2, 3-4, 5-6.........23-24, 25-26 but when I get to wanting to create the next Pair with using an aggregate device, it is offset by 1, because Input 27 is the "TalkBack" channel.
With an Aggregate Device set up, it should continue as a Stereo pair 29-30, 31-32 and so on, but the TalkBack channel stops that. So what is happening in reality is that Channel 27 is the TalkBack and 28 comes out the right speaker, but is actually the left channel of a Synth, stereo pair 29-30 is the Right channel of a Synth and a Left channel of the next Synth respectively.
I wrote and have images in the Forum:
What I want to do is to be able to disable the TalkBack Input in "Universal Control" so the Quantum is only channel 1 to 26, breaking down to 13 Stereo Pairs. This way my Aggregate device that follows is also "Even" with stereo pairs.