I apologize about the time difference, I'm on the West coast, USA. It's morning here.
I think I'm getting the big picture of what you're trying to accomplish. When using aux channels, they are mono, and should always be panned far left and far right respectably to 3/4, 5/6, 7/8, etc... This will give you stereo separation.
Remember that when you are panning, that will give you total control of the individual channels as well. For example, if I want to pan the vocals for The Cars' "Moving in Stereo", and I wanted it to pan evenly, send 1,3,5 and 7 to the left side, 2, 4, 6 and 8 to the right side, and my vocal pan would evenly pan to the left and the right. This is great for stereo zones.
If you're trying to isolate each channel, say, for surround sound, this can be done as well. Split up your tracks, and send them to aux 1/2, 3,4, etc... Then pan 1 left, 2 right, 3 left, 4 right... This will allow you to have 8 different zones with 2 main outs and 6 aux, each independently fed.
In Qlab, you have 48 channels of audio output, so you can designate 1-8 as your outputs, and pan them accordingly, depending on what you want coming out of each speaker.
With that all said, I could use a typical setup that you are trying to do to help, if you are still having difficulties. Splitting up the aux outs by panning will give you a lot more freedom to do what you want. If you still have trouble, let me know what works, and what isn't working like it should, and we'll work out the bugs.