Syncing Calendars

I finally got the add on to work with Outlook, however, every time the calendar syncs it just creates a copy of the calendar events and adds them to the Hitask calendar, so I end up with a long list of duplicate events. I thought selecting “merge” would fix the problem but it has not. I don’t want to do a two-way sync, I just want to be able to view my calendar events from my outlook calendar.