More Audio Track Assignment Issues

Boy is this getting old, and boy is this a Premiere-only problem (or a me problem– I'm open to criticism!)

Why am I getting no audio from my multicam clip?

Here is the multicam – it has 11 channels of audio (all track mono), of which only 6 are usable/needed.

I didn't delete any source media tracks, but took the advice I've gotten here and simply remapped the clips in Modify>Audio Channels. Here is what the map looks like. 

And yet when I drag the clip into a timeline there is zero audio. It's not just that your not seeing a waveform – there is no audio.

Premiere, why oh why are you like this? Do you know how bad you have to be at something to make me wish for Avid? Every time I think I've finally got it sorted (and I've been doing this a long time), there's another curveball to be met with. 

If anyone who understands the deeply arcane way Premiere handles audio track assignments, I'd be deeply grateful for some insight.