Hi Teflon Chook,
There are several controls that feed this. One of which is the dash light intensity control on the left side of the steering wheel. If you have it rolled up all the way to max (a detent position) it will override the day/night auto setting and leave it permenently on day. I believe that this is the source of your issue.
is there a way to a way to turn the light setting all the way up to bright but wo initiating the override function of the night mode for navi? I like my dash lights bright but don't want it on day mode all the time.