Diluta simplifies your flow by combining Reminders, Recurrence, and Progress Tracking.
For recurring tasks, the Start date controls when the schedule begins. The Due date is the current occurrence and moves forward when you mark the task as Done.
For Day(s) recurrence you can either choose your interval thru the use of the Every input or you can select on what day of the week the recurrence will repeat.
In the event that you want to change your recurring options, make sure to always reset the option that you do not intent to use. Like set Every to zero if you intend to use Days of the week.
Use Task when you want to track progress and complete each interval. Use Event when you only want it to appear on your calendar.