在一个融合层中可以有多少不同的标记有限制吗

我有一个带有融合表层的实现，在那里我尝试使用带有字母A-Z的预定义标记图标来显示地图上搜索查询的结果（很像原始的谷歌地图）。

我实现这一点的方法是首先创建一个层，为所有标记提供一个通用图标。。

var layer = new google.maps.FusionTablesLayer({
    query: {
        select: 'Geometry',
        from: 0000000
    },
    map: map,
    options: {
        suppressInfoWindows: true
    },
    styles: [{
        markerOptions: {
            iconName: "measle_white"
        }
    }]
});

同时，我在同一张表中查询了25个结果，其中ST_DISTANCE排序基于我的地图的中心位置（地理位置），

var queryUrlHead = 'http://www.google.com/fusiontables/api/query?sql=',
    queryUrlTail = '&jsonCallback=success',
    query = 'SELECT+ID+FROM+0000000+ORDER+BY+ST_DISTANCE(Geometry,LATLNG('+position.coords.latitude+','+position.coords.longitude+'))+LIMIT+25';
var queryurl = queryUrlHead + query + queryUrlTail;

返回的JSON对象是一个唯一ID的数组，我称之为"ids"。然后，我使用一些触发器（zoomchanged）用字母图标重新绘制25个最近的图标（受此影响）。

    google.maps.event.addListener(map, 'zoom_changed', function () {
layer.setOptions({
    styles: [{
            markerOptions: {
                iconName: "measle_white"
            }
        }, //fallback
        {
            where: "'ID' = " + ids.table.rows[0][0],
            markerOptions: {
                iconName: "a_blue"
            }
        }, {
            where: "'ID' = " + ids.table.rows[1][0],
            markerOptions: {
                iconName: "b_blue"
            }
        }, {
            where: "'ID' = " + ids.table.rows[2][0],
            markerOptions: {
                iconName: "c_blue"
            }
        }, {
            where: "'ID' = " + ids.table.rows[3][0],
            markerOptions: {
                iconName: "d_blue"
            }
        }, {
            where: "'ID' = " + ids.table.rows[4][0],
            markerOptions: {
                iconName: "e_blue"
            }
        }, {
            where: "'ID' = " + ids.table.rows[5][0],
            markerOptions: {
                iconName: "f_blue"
            }
        }, {
            where: "'ID' = " + ids.table.rows[6][0],
            markerOptions: {
                iconName: "g_blue"
            }
        }, {
            where: "'ID' = " + ids.table.rows[7][0],
            markerOptions: {
                iconName: "h_blue"
            }
        }, {
            where: "'ID' = " + ids.table.rows[8][0],
            markerOptions: {
                iconName: "i_blue"
            }
        }, {
            where: "'ID' = " + ids.table.rows[9][0],
            markerOptions: {
                iconName: "j_blue"
            }
        }, {
            where: "'ID' = " + ids.table.rows[10][0],
            markerOptions: {
                iconName: "k_blue"
            }
        }, {
            where: "'ID' = " + ids.table.rows[11][0],
            markerOptions: {
                iconName: "l_blue"
            }
        }, {
            where: "'ID' = " + ids.table.rows[12][0],
            markerOptions: {
                iconName: "m_blue"
            }
        }, {
            where: "'ID' = " + ids.table.rows[13][0],
            markerOptions: {
                iconName: "n_blue"
            }
        }, {
            where: "'ID' = " + ids.table.rows[14][0],
            markerOptions: {
                iconName: "o_blue"
            }
        }, {
            where: "'ID' = " + ids.table.rows[15][0],
            markerOptions: {
                iconName: "p_blue"
            }
        }, {
            where: "'ID' = " + ids.table.rows[16][0],
            markerOptions: {
                iconName: "q_blue"
            }
        }, {
            where: "'ID' = " + ids.table.rows[17][0],
            markerOptions: {
                iconName: "r_blue"
            }
        }, {
            where: "'ID' = " + ids.table.rows[18][0],
            markerOptions: {
                iconName: "s_blue"
            }
        }, {
            where: "'ID' = " + ids.table.rows[19][0],
            markerOptions: {
                iconName: "t_blue"
            }
        }, {
            where: "'ID' = " + ids.table.rows[20][0],
            markerOptions: {
                iconName: "u_blue"
            }
        }, {
            where: "'ID' = " + ids.table.rows[21][0],
            markerOptions: {
                iconName: "v_blue"
            }
        }, {
            where: "'ID' = " + ids.table.rows[22][0],
            markerOptions: {
                iconName: "w_blue"
            }
        }, {
            where: "'ID' = " + ids.table.rows[23][0],
            markerOptions: {
                iconName: "x_blue"
            }
        }, {
            where: "'ID' = " + ids.table.rows[24][0],
            markerOptions: {
                iconName: "z_blue"
            }
        }
    ]
});

现在，除了前5个结果A-D（后退图标为+1）之外，这实际上非常有效。这里出了什么问题？我是达到了某个限制（markerOptions只接受5个值？？）还是把代码搞砸了？

旁注：这个例子似乎每层有5个以上的图标，但谷歌做到了，我一个都不懂。