Hi Steven.

I Think this is a bug.
After conducting various tests, I've proven that this phenomenon occurs in the new Autosetup 2.0 but not in the previous version, Autosetup 1.41. Could you please review the video?
This time, I prepared two Aeron models. One was imported using Autosetup 2.0, while the other was imported using Autosetup 1.41 in a separate project file and then migrated over. The result is that when playing the sequencer with simulate pressed, only the one imported with Autosetup 2.0 exhibits the faces overlapping.
Additionally, the Autosetup 2.0 one always displays a large number of error messages after simulate. This also does not occur with characters from Autosetup 1.41.

①https://youtu.be/q3CQalxX0AY

One more point: I don't know the cause of this phenomenon, but please check the second video. This Aaron animation was imported directly from a CC5 template project with no modifications. For some reason, adding body animation makes the face overlap disappear. However, applying body animation unrelated to the template project causes the problem to reappear.
However, if you imported using autosetup1.4, the face duplication problem doesn't occur at all, regardless of which body animation you apply, or even if you apply only the face animation itself.
②https://youtu.be/g2dv0Kr9FBE

If you insist this isn't a bug, could you please perform the same steps I did? I perfectly replicated the tutorial method you provided from the link and also tried baking the animation to the control rig. The problem persisted. 

I've also tested with various other face animations.

Please address this issue seriously. I've been completely unable to render and have been in real trouble these past few days.