Someone else may have a better idea, but I can only suggest that you sync them manually inside of PP.
Jim, sure hope someone has a better idea. I purchased Pluraleyes to avoid having to manually sync. I've tried ignoring this translation issue message, since a file does get exported, but Pluraleyes isn't able to sync from it, so I'm assuming the problem starts with Premier.
Still hopeful there's an answer out there. As a test, I tried using a ten minute segment of 2 camera footage along with separately recorded audio. The export to FCP XML result was the same, two mystery clips and mystery audio mentioned in the "Translation Results" above.
Here's a clue, maybe. I tried to cut the Zoom H4 audio to that same 10 minutes, and it wouldn't cut. What's that about?
As you may guess, I'm a bit rusty on things Premier. I'm in the process of migrating my editing from Final Cut to Premier, and not able to put the time into it as I'd like. So, again, any help from anyone more knowledgeable than me would be greatly appreciated.