Is it possible for two people to be having an OOB at the same time and they return to the wrong bodies?

Thats correct Thomas.

Not only that, but while out of body, your etheric energy body is still attached to your physical body, with a part of your consciousness still inside, while another part of your consciousness is out exploring in an energetic copy of your main energy body.  Only a part of your consciousness leaves, while a part of your consciousness stays.  Your physical body is never just an empty shell.  

This was discovered by Robert Bruce, but my experience has verified this to a certain degree as well.