Automatically Sort Due Dates as They Change

I'm attempting to get a column of due dates to update automatically every time a date changes. The due dates are in B3:B15. There is a header in B3. The day after the actual due date, it is automatically changed to the same day on the next month (showing the next due date). I need the spread sheet to automatically sort the due dates from the closest due at the top, to the furthest due date from today at the bottom. Running it manually, or sorting it manually every time won't work. This is for an elderly couple who are having problems keeping track of everything each month. I just need something that will show them the upcoming bills and how soon they are due when they open the workbook. Anything other than opening the workbook is going to be too complicated. I'm new to macros. I've tried to modify some I've found in other threads, but no luck (lots of error messages). I don't understand it enough yet to figure out what I need to change. I've attached a sample sheet that shows the part of the workbook I'm having trouble with. Any help would be greatly appreciated.