I had a Tesla empolyee tell me that they are "timed" to not hit each other, but I never believed this. I wouldn't think they could hit each other because I have the following (possibly misguided) expectations:
1) The FWD opens straight out, so it is never any further forward than when it is closed
2) The driver door opens on a hinge, since it doesn't change lengths as it opens, it is never as far backward as when it is closed
For the doors to touch each other, one of those expectations has to be broken. I don't see how (2) can be breakable while the hinge is still inside the constraints of the body. That having been said, (1) might be more breakable due to the complexity of the design, with the top section being a different size in front than in back and the door being a different height in front than in back. Regardless, with a CPO vehicle that is presumably still under warranty, I would definitely bring this up with the service center.