Check the CO trunk group to determine which call routing tables are used in day and night mode. It’s possible that not all DIDs are in the night table.
If there are only a few numbers that need different day/night routing, put only those numbers in the night table. Point the + and E entries at the bottom of the night table back to your day table. That will reduce the amount of data entry required and potential routing errors.
It’s all explained pretty well in the help screen, press F1 while at call routing tables.