I've just bought a second hand 3368 Space Centre and I think there is a mistake in the instructions. According to the inventory there should only be one 4211805 in the pack
but the step looks like it requires two
The set was listed as complete so my question is, did Lego make a mistake and ship these sets with only one 4211805, or did the seller just go by the inventory and therefore leave out one of the 4211805s that came in the original box?