The universe they see from the scenic overlook isn't parallel - it's just another universe. Like two soap bubbles clinging together, they join at that one point. It was just a comedic convienience, and possibly a quantum necessity, for our crew to have seen themselves across the interface.Parallel universes
are case mods
of THIS universe.
(Oh - And - My favorite parallel universe is the, "Naked Amy," universe, although it didn't make it into the episode....)
I like Universe 1( as a Fry/Leela shippy person that is the closest they got) And I always wondered if in the universe where no one has eye's wouldn't that mean Leela is normal and isn't mutated in any way?
Mmm - no. Everyone in that universe has two less eyes, right? Leele is a mutant with...
(Wait for it...)
NEGATIVE ONE EYE!!