Somtimes when you are astral travelling you may become aware that there are more than one of you that is out.
This is what is termed Multiple Astral Bodies.
This situation is very rare and nothing to worry about.
You will probably eventually come across this if you astral travel a lot
It appears to be just an illusion and the seat of consciousness remains with you.
Usually You will see just one more of you, but some people have reported seeing several of themselves while astral travelling.
Astral Travel
Paralumun New Age Village