I use the database to store password and user names only, I use a POST to submit the table data to the schedule page. None of the schedules are kept, if I re-enter the schedule, it overwrites the current one.
One thing I tested was I entered the schedule data on my home computer and checked the next day and the schedule was still there, but when the schedule data is entered at the work computer, it goes away the next day. Maybe something wrong with work computer?