Don't you think if you could see a deceased humans spirit in the physical world you would also be able to see a projecting humans spirit? Also, if you're ever projected before in the etheric you should notice that you aren't just a "shadow", so since you're no different in appearance from the deceased humans spirit it can't be a spirit. That is unless that is how they appear in the physical world. It could've just been a hallucination or just your own shadow, I really don't know.