This is called a residual spirit.
Most of what is experienced (seen, heard and felt) is 'residual'.. dont think of something as 'human' simply because it has that shape or speaks with something resembling a human voice. There are many parts to us...
Dan, might I suggest you look up the terms PALO MONTE MAYOMBE in google and consider taking up a new religion?.. its just a thought.
Antonio.
PS. If you still have problems with unwanted energies, I might be able to find someone near you who can...