When Jimmy is catching the train home, Jimmy is riding in a Type K train used by City Rail (at the time) for Sydney suburban rail services, but when we cut outside to The Man watching Jimmy go, it shows a Type V train, used for NSW inter-urban services.
In the scene where Jimmy arrives at Sharon's apartment building, the light indicates early morning/late afternoon. This would not be possible between the scene before (a 10am meeting with Pando) and the scene after (a midday swim at Bondi Beach).