A Cycle indicates that a person is related in the tree in multiple ways. When a cycle is created, the result is the x2 symbol which signifies that person is related to the tree in two ways.
To remove a Cycle:
Click 'edit' on the person's node and select the Relationships tab. Check the box next to the relationship you want to remove and click 'Remove.' Once you are finished Save & Close.
Updated: July 30, 2015