[CLOSED] Grid rowbody feature

[RRD]

Hi.
I am using grid with RowBody feature and GetAdditionalData function.

function GetAdditionalDataFn(record, rowIndex, rowValues) {
    var headerCt = this.view.headerCt,
            colspan = headerCt.getColumnCount();    
    var body = "";
    if (rowIndex === index2)
        body = html2;
    return {
        rowBody: body,
        rowBodyCls: this.rowBodyCls,
        rowBodyColspan: colspan
    };
}

This code calls 4 times and insert the same data 2 times. Why the same data inserted 2 times?