HELP!!

The text from your last post:
We are changing to new shifts and currently running three, but if you get one figured out, I can figure out the other two, so one shift is 6:00-14:30, 2nd shift is 14:30-23:00 and 3rd shift is 20:00-6:30, but you can do the first 6:00-14:30, thanks.

and from Post#15:
Is there a way to allow the list to always have 24 hours of time available to select from? The way it currently works it runs out at 0:30. Ideally, if you select the time allowed in the list should be 24 hours from the end time in cell above.

seem (to me) to be contradictory. Now I am totally confused. can you have another bash at explaining... (Take a deep breath, first!!)