I noticed that, too. I think they probably had another Sylvania set around the house and all the paperwork got lumped together.
Last week my uncle stopped in and gave me the owner's manual packet that came with the mid-80s Emerson my cousin had when he was a kid. But my uncle thought it was for his '67 Admiral. Non-collectors don't have an eye for the same things.
(no, the Admiral is long gone
)