extjs3.0 动态添加组件问题

 this.basePanel = new Ext.form.FieldSet(
                                        {
                                            title :"投票信息",
                                            layout :"form",
                                            border :true,
                                            items : [ {
                                                layout :"column",
                                                columnWidth :1,
                                                border :false,
                                                defaults : {
                                                    border :false
                                                },
                                                items : [
                                                        {
                                                            layout :"form",
                                                            columnWidth :1,
                                                            defaults : {
                                                                width :"80%"
                                                            },
                                                            items : [
                                                                    {
                                                                        xtype :"hidden",
                                                                        name :"vote.voteId",
                                                                        value :this.voteId != null ? this.voteId
                                                                                : ""
                                                                    },{
                                                                        xtype :"hidden",
                                                                        name :"vote.count",
                                                                        value:0
                                                                    },{
                                                                        anchor :"99%",
                                                                        xtype :"textfield",
                                                                        name :"vote.confTopic",
                                                                        fieldLabel :"投票标题",
                                                                        allowBlank :false,
                                                                    }, {
                                                                        columnWidth :1,
                                                                        anchor :"100%",
                                                                        layout :"form",
                                                                        height :160,
                                                                        border :false,
                                                                        items : [ {
                                                                            anchor :"98%",
                                                                            name :"vote.voteDesc",
                                                                            xtype :"htmleditor",
                                                                            height :150,
                                                                            fieldLabel :"投票描述",
                                                                            autoScroll :true,
                                                                            maxLength :4000
                                                                        } ]
                                                                    },{
                                                                            xtype :"button",
                                                                            iconCls :"menu-add",
                                                                            width:70,
                                                                            text :"增加投票项",
                                                                            scope :this,
                                                                            handler :this.addText
                                                                            }

                                                                     ]
                                                        } ]
                                            } ]
                                        });
                                        addText : function(){
                        var bp = this.basePanel;
                        var i = bp.getCmpByName("vote.count").getValue();
                        var fd = new Ext.Container({
                            fieldLabel :"投票选项",
                            columnWidth :1,
                            layout :"column",
                            border :false,
                            items : [ {
                                columnWidth :0.85,
                                anchor :"99%",
                                xtype :"textfield",
                                fieldLabel :"投票项",
                                name :"voteOption.voteDesc"+i,
                                allowBlank :false,
                            }, {
                                width :75,
                                defaultType :"button",
                                border :false,
                                items : [ {
                                    iconCls :"menu-del",
                                    text :"删除此项",
                                    scope :this,
                                    handler :function(){
                                        this.basePanel.remove(fd,true);
                                        this.basePanel.doLayout();
                                    }
                                }]
                            } ]
                        });
                        i++;
                        bp.getCmpByName("vote.count").setValue(i);
                        bp.add(fd);
                        console.log(bp)
                        bp.doLayout();
                        console.log(bp.getCmpByName("vote.count"));
                        //debugger;

                    }

核心代码如上所示，点击增加选项后创建新的Container，但是出现了奇怪的现象，添加到第八个后，这一块的布局出现错误

f12看下描述之类的容器是否还存在，可能是设置了最大高度，超过了直接隐藏起来了