Sometimes after buying morning sim and night owl you have to quite your game and then start it up again or wait a complete 24 game hours. I'm not sure why that is, but maybe that is what you are experiencing CynKuy.
You know I've never bothered to figure out what the times were
@oshizu , thanks for saving me from my laziness. I would just fudge a sort-of-round-about time in my head and carry on!