Please check the properties of the Subform/Table/Row, Hopefully it is using "Repeat Subform for Each Data Item" property.
Select the Subform/Table/Row which is repeating and check the properties under: Object -> Binding TAB
If "Repeat Subform for Each Data Item" is checked and the Min countis 3 need to change the Min Count to 1. If this subform/Table/Row never repeats at all, can uncheck the "Repeat Subform for Each Data Item" it self. If this is not the case might need to check the scripting on the form.