Replicate column Header

Question

I Guys, when I enter more than one store, the header columns are duplicated(if the store are two, if store are three the header colums triplicate). Example: if I choose two stores you create two headers (the duplicate header does not have rows). I leave you the code in case you can help me I would be very grateful.

deliveringGrid.getChildren().clear();

    Date startDate = dateFrom.getValue();
    Date endDate = dateTo.getValue();

    List<Date> dates = new ArrayList<Date>();
    long start = startDate.getTime();
    long end = endDate.getTime();
    long interval = 24 * 1000 * 60 * 60;

    while (start <= end)
    {
        dates.add(new Date(start));
        start += interval;
    }



    SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");

    columns = new Columns();
    columns.setStyle("text-align: center;");
    rows = new Rows();

    Column col = new Column();
    col.setStyle("width: 120px; background: rgb(195,218,249);");
    Label label = new Label(getLabel(STORE).toUpperCase());
    label.setStyle("color: rgb(21,66,151); font-weight: bold;");
    col.appendChild(label);

    columns.appendChild(col);



    for (StoreManagerModel storeManagerModel : storeList)
    {

        Row storeRow = new Row();
        storeRow.setStyle("text-align: center;");

        Label storeName = new Label(storeManagerModel.getName() + " - " + storeManagerModel.getStoreRef());
        storeName.setStyle("color: rgb(21,66,151); font-weight: bold;");
        storeRow.appendChild(storeName);

        for (Date date : dates)
        {
            final SimpleDateFormat dateFormat = new SimpleDateFormat("dd-MM-yyyy");
            List<List<Object>> query = orderDeliveringService.getOrderDeliveringWithDayDistribution(date, storeManagerModel);
            List<OrderDeliveringModel> orderDeliveringModelList = OrderDeliveringConverter.convertData(query);

            Column dayCol = new Column();
            dayCol.setStyle(COLUMN_HEADERS_STYLE);

            int dayOfWeek = TimeSlotDateUtils.getDayOfWeek(date);
            String dayString = getDayOfWeekAsString(dayOfWeek);

            Label headerLabel = new Label(dayString + " " + dateFormat.format(date));
            dayCol.appendChild(headerLabel);

            Label day1;


            if (CollectionUtils.isNotEmpty(orderDeliveringModelList))
            {
                StoreManagerModel orderDeliveringModelStore = orderDeliveringModelList.get(0).getStore();
                Date orderDeliveringModelData = orderDeliveringModelList.get(0).getDay();
                Integer orderDeliveringModelOrder = orderDeliveringModelList.get(0).getOrderCount().get(0);
                Integer orderDeliveringModelTotalCapacity = orderDeliveringModelList.get(0).getTotalCapacity().get(0);
                day1 = new Label(orderDeliveringModelOrder + " / " + orderDeliveringModelTotalCapacity);
                day1.setAttribute("storePlusDate", orderDeliveringModelStore.getStoreRef() + "*" + dateFormat.format(date));
            }

            else
            {
                day1 = new Label(" - / - ");
                day1.setAttribute("storePlusDate", storeManagerModel.getStoreRef() + "*" + dateFormat.format(date));
            }

            columns.appendChild(dayCol);
            storeRow.appendChild(day1);
        }

        rows.appendChild(storeRow);

    }

    deliveringGrid.appendChild(columns);
    deliveringGrid.appendChild(rows);