The Train Rider question

Was I the only one distracted by the Author's lack of knowledge of Melbourne's train system. He refers to 'the Dandenongs' as being heavily populated with most people commuting to the City by train and then points out that the Dandenong Railway Station is a major hub. The latter may be true but the people of the hills don't cross the Silvan valley to use it, they live on a completely different train line, either the Belgrave line or the Lilydale line (depending upon which side of the mountains they are on)and both converge at Ringwood. He then implies that the killer's house at Eltham is in the Dandenongs. For one, Melbourne people don't refer to Eltham as the Dandenongs, and two, it's on yet another train line (the Hurstbridge line) and you wouldn't go anywhere near Dandenong or the Dandenongs to get to it.