js cols 设置二级表头表格填充数据时多出一倍空白列

cols : [[
{field:'inter_code',width:150,title:'接口调用代码'}
,{field:'interface_code',width:150,title:'0'}
,{field:'inter_description',width:150,title:'接口调用说明'}
,{field:'interface_description',width:150,title:'接口调用成功'}
,{field:'res_description',width:150,title:'结果描述'}
,{field:'results_description',width:150,title:'查无此设备'}
], [
{field:'box_ip', width:150, title: '机顶盒IP', sort: true}
,{field:'business_account', width:150, title: '业务账号'}
,{field:'box_type', width:150, title: '机顶盒型号'}
,{field:'box_mac', width:150, title: '机顶盒MAC'}
,{field:'box_sn', width:150, title: '机顶盒sn号'}
,{field:'box_version', title: '机顶盒软件版本', width: 150}
]],