What the heck does "leather backed" mean? Whats the point in having
leather if its not on the *outside*?

Typical cheap factory leather seats only have leather on the seating
surfaces, not on the sides or back.

Often aftermarket dealer-added leather kits skip details the factory
option includes such as armrests and steering wheel. Don't know how
things are these days but 20 years ago Porsche had 11 pages of leather
options. Leather on the door lock knob? Leather on the backside of
inside rear view mirror. Darn near every inside surface was listed with
a leather option.