Why does NAV create 2 To-dos in the To-do table - when a user creates 1 To-do?

Can anybody explain why NAV create 2 To-dos in the To-do table when a User creates 1 To-do? The 2 To-dos have different System To-do Type values i.e. Organizer and Contact Attendee.


One of my Customers have had some problems as some Users has assigned Notes to both To-dos which causes some confusion.


I'm not able to give the customer a proper explanation. Can anybody help me?