CSaleBasket::GetList - странный результат работы

$dbBasketItems = \CSaleBasket::GetList(
    array("ID" => "ASC"),
    $arFilterBasket,
    false,
    false,
    array("PRODUCT_ID", "FUSER_ID", "ORDER_ID", "USER_ID")//"USER_ID"
);//


/*
$dbBasketItems = BasketTable::getList(array(
    'order' => array("ID" => "ASC"),
    'filter' => $arFilterBasket,
    'select' => array("PRODUCT_ID", "FUSER_ID", "ORDER_ID", "USER_ID")
));
*/
while ($arBasketItem = $dbBasketItems->Fetch()) {

    echo "--arBasketItem--";
    Debug($arBasketItem);

    $row = \CSaleOrder::GetByID($arBasketItem["ORDER_ID"]);
    Debug($row["USER_ID"]);

    /** все товары из заказов, созданных за последние 30 дней */
    $arAllOrderedItemsInBasketByUserID[$arBasketItem['FUSER_ID']][] = $arBasketItem["PRODUCT_ID"];//USER_ID
}

--arBasketItem--Array
(
    [PRODUCT_ID] => 89
    [FUSER_ID] => 6
    [ORDER_ID] => 1
    [USER_ID] => 186
)
1--arBasketItem--Array
(
    [PRODUCT_ID] => 131
    [FUSER_ID] => 6
    [ORDER_ID] => 1
    [USER_ID] => 186
)
1