I don't argue that logically it looks like a question about upstream but does that stretch as high as channel 10? I've never seen any stats showing an upstream channel that high.
I'm guessing the OP really was talking about wireless channels in which case it is better to use ethernet and if that isn't practical use
InSSIDer to find the least used channel locally and set the Superhub to that one. I've seen claims that on auto it can actually pick the worst channel.