Frogman,
Is it saying 5 hrs total? or 5 hrs day? My columns only say something like 5 hrs P2, 3 hrs night. This is not 8 hrs flying, but just as intended when you entered it, 5 hrs P2 of which 3 hrs was night, there is no actual day column.
It's actually doing it correctly. When you print the report, all the numbers will be correct in their respective day/night columns, it's only in the main window that it looks a little odd.
Try printing or viewing a report.