Create Blank Row When I past Data In Matrix

I want to add auto rows In matrix But When I past Row Data in Matrix, It create Blank Rows Between Pasted Records.

The code I used to generate auto rows is ..

private void Matrix1_LostFocusAfter(object sboObject, SBOItemEventArg pVal)

{

//throw new System.NotImplementedException();

if (pVal.ColUID == "C_0_20")

{

Matrix1.AddRow();

Matrix1.ClearRowData(Matrix1.RowCount);

}

}

and out put is