求助Ext window二次打开问题

Question

在grid列表通过Ext.create('App.good.GoodRecommend').show()打开window，第一次都是正常的，第二次打开就会是这样的效果
然后选中的值和填的排序号也无法获取到，请大神帮忙一下

 Ext.define('App.good.GoodRecommend', {
    extend: 'Ext.window.Window',
    title: '商品推荐位置',
    width: 300,
    height:200,
    modal: true,
    resizable: false,
    closeAction : 'close',
    id:'goodRecommend',
    layout: 'fit',
    onEsc: function () {
        this.close();
    },
    constrainHeader: true,
    initComponent: function () {
        this.items = this.createForm();
        this.buttons = this.createBtns();

        this.callParent(arguments);
    },
    //表单form
    createForm: function () {
        return {
            xtype: 'form',
            id:'recommendForm',
            bodyPadding: 10,
            border: false,
            autoScroll: true,
            fieldDefaults: {
                labelAlign: 'right',
                labelWidth: 90,
                labelStyle: 'color:green;padding-left:4px'
            },
            items: [{
                xtype: 'radiogroup',
                id: 'radioName',
                name: 'radioName',
                autoHeight: true,
                layout:'form',
                columns: 6,
                border: true,
                anchor: '100%'
              }]
        };
    },

    //按钮列表
    createBtns: function () {
        return [{
            text: '确定',
            scope: this,
            formbind: true,
            handler: this.goodsRecommend
        }, {
            text: '取消',
            scope: this,
            handler: function(){
                this.close();
            }
        }];
    },
    goodsRecommend:function(){
        var position = '';
        var positionId = '';
        var rdItems = Ext.getCmp('radioName').items;
        for(var i=0;i < rdItems.length;i++){
           if(rdItems.get(i).checked){
               position = rdItems.get(i).boxLabel;
               positionId = rdItems.get(i).inputValue ;
           }
        }
        var sort = Ext.getCmp('sort').getValue();
        if(positionId  == ""){
            Ext.MessageBox.confirm('提示', "商品推荐位置不能为空！");
        }else{
            Ext.Ajax.request({
                method: 'POST',
                url: basePath + '/good/goodRecommend.html',
                params: {
                    'goodsId': goodsId,
                    'positionId':positionId,
                    'position':position,
                    'recommendSort':sort
                },
                success: function() {
                    Ext.getCmp('goodGrid').getStore().reload();
                    Ext.getCmp('goodRecommend').close();
                    Ext.getCmp('recommendForm').getForm().reset();
                    Ext.getCmp('sort').reset();
                    success();
                },
                error: function() {
                    error();
                }
            });
        }
    }
});

Ext.Ajax.request({
    url: basePath + '/good/queryParamDetail.html',
    params : {'groupId':'DJBH151202001'},
    success: function(response) {
        var res = eval("("+response.responseText+")");
        var radiogroup = Ext.getCmp("radioName");
        for (var i = 0; i < res.length; i++) {
          var radio = new Ext.form.Radio({
              boxLabel: res[i].name,
              name: 'recommendGood',
              inputValue:res[i].value
           });
          radiogroup.items.add(radio);
        }
        var n = new Ext.form.NumberField({  
              fieldLabel: "排序",
              id: "sort",
              labelWidth: 40,
              width: 100 ,
              allowDecimals:false,
              maxValue: 99,
              minValue: 1
        }) ;
        Ext.getCmp('recommendForm').items.add(n);
        Ext.getCmp('recommendForm').doLayout();
    }
 });