When the Saturn V rocket is shown on the launch pad for Apollo 18, the scene changes between shots from a Saturn V to a Saturn IB.
During the launch of Apollo 18, several reaction shots in Mission Control show Stanley Mott and Deiter Kolpf in the MCC room, yet at the same time, through several scenes intertwined with the launch, both men are shown as being on a TV stage narrating the launch and explaining things as they happen.