When I create a new content node with a date-time field including Show End Date option in order to show it in the calendar view, the content is for whatever reason duplicated in the calendar. When I for instance switch the format from calendar to table the content is not duplicated! So I figure there must be something wrong with the calendar view. I followed the HowTo on Vimeo (http://vimeo.com/26853285) on configuring Calendar7.x-3.x-dev and can't notice anything wrong in my setup.

Can anyone help me out here?