The duplication of habit events in Calendar may be resulted from the mode of syncing you are choosing.
There are 2 modes for event syncing:
"All-Day Events" simplifies your calendar by condensing each habit into daily events. It's perfect for getting a quick overview of your daily habits without cluttering your schedule.
"Based on Reminder Time" breaks down each habit into individual events, respecting the specific reminder times you've set. However, if you have multiple reminders for a habit, you may see multiple events for that habit in your calendar.
You may choose the mode "Based on Reminder Time" if you get duplicated events for a habit in your Calendar. Please switch the mode to All-Day Events to get rid of them.
In case switching mode doesn't work, please don't hesitate to contact us via the live chat box.