The problem is related to how Qmix-AI handles Unicode characters and the fact that Apple's iOS device default name scheme uses a Unicode curly apostrophe, aka a "real" apostrophe.
For an iOS device with an apostrophe in the name that's running Qmix-AI, the device shows up in UC Surface on PC with a � character replacing the apostrophe, but in UC Surface on Mac or on an iPad, the Qmix-AI iOS device doesn't show up at all, though you can still select the blank space and set permissions.
A fix should be forthcoming in a future Qmix-AI update, but for now, if you simply rename your iOS device without a "real" apostrophe, it should correct the issue. You can even just rename it with essentially the same name, as long as you re-type the "apostrophe", because the default iOS keyboard uses the prime symbol instead of the "real" apostrophe that causes the problem:
http://desandro.tumblr.com/post/733006704/mule-design-studios-blog-...
Here's an example of each, in UC Surface on PC.
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In UC Surface on Mac or the iPad, the second one, the one with the real apostrophe, won't show up in the list.