Physical/Etheric Body

[Risu no Kairu]

All the book really says is that the Etheric body is attached to the physical body until death. That's why you can turn it around in your physically body, but not get out. It says that a projected double is just a copy of the etheric body with all the memories of the etheric body.

The copy goes out, comes back, and remerges with the original, reshaping hte original.

[fetik3]

I've just started reading "Astral Dynamics" and am a bit confused on some of the concepts.  The main thing that is confusing me is the idea of the "physical/etheric body."  My initial understanding is that there is our physical body, and from that comes an "etheric body."  However, as the book continues, there seems to be a combination of the two called the "physical/etheric body."  Are these two ideas combined because they share a synchronized "mind"?  Or is the physical mind having an independent experience to that of the etheric mind?  

Also the "Mind Split" illustration on Page 70 states that the Dream Mind is a reflected copy, but the Etheric mind is the master copy.  Isn't the dream mind part of the physical body, and if so, wouldn't that be the master copy?

Thanks in advance!