The correct school zone for Bray Park High School is between 27°18’00.3″S 152°57’40.2″E and 27°17’55.0″S 152°57’48.7″E on Lavarack Road. There is no school zone on Old North Road. I have now submitted this information via feedback.
As for the speed limits, maybe I have a setting on my Hema HN7 that ignores speed limits on minor roads and streets. For instance, it does not show a speed limit when driving on Oxford Street, Joyner 27°17’11.5″S 152°56’50.3″E, even though Oxford Street has a 60km/h speed in Map Creator.