After you register, your calendar will be populated with all the Open dates you have for lunch.  It will directly reflect the time and number of lunches you selected in your default settings for each day of the week.  As a representative schedules a lunch, the date will be populated with information from the representative.

If you need to make changes to a specific date, you just click on that date and make the changes.  You can close a date, open a date, change the time, number of lunches, etc.  You are never out of control.