Coping and then pasting a synced event in the calendar will lead to this issue:

1. on paste, the event is moved rather than copied

2. on scrolling the calendar, the event will split into two separate events in the destination time slot

3. at one point after messing around with those split items, I was unable to use drag and drop on any items in the calendar - after scrolling the items would always return to their starting slot in the calendar.