Elements in cell editor are shifted

Code:

Ext.define('zldapp.view.Viewport', {
    extend: 'Ext.Viewport',    
       alias: ['widget.viewport'],
       controllers:['viewport.viewport'],
    requires:['zldapp.view.zytab.zyTab'],    
    
       initComponent: function() {
       var me = this;    




        Ext.create('Ext.data.Store', {
            storeId: 'simpsonsStore',
            fields: ['name', 'email', 'phone','work'],
            data: {
                'items': [{
                    "name": "Lisa",
                    "email": "lisa@simpsons.com",
                    "phone": "555-111-1224",
                      "work": 0
                }, {
                    "name": "Bart",
                    "email": "bart@simpsons.com",
                    "phone": "555-222-1234",
                      "work": 2
                }, {
                    "name": "Homer",
                    "email": "home@simpsons.com",
                    "phone": "555-222-1244",
                      "work": 1
                }, {
                    "name": "Marge",
                    "email": "marge@simpsons.com",
                    "phone": "555-222-1254",
                      "work": 0
                }]
            },
            proxy: {
                type: 'memory',
                reader: {
                    type: 'json',
                    root: 'items'
                }
            }
        });




        editorgrid  = Ext.create('Ext.grid.Panel', {
            title: 'Simpsons',
            store: Ext.data.StoreManager.lookup('simpsonsStore'),
        anchor: '-50',
            
            columns: [{
                header: 'Name',
                width: 100,
                dataIndex: 'name',
                editor: 'textfield'
            }, {
                header: 'Email',
                dataIndex: 'email',
                width: 100,
                editor: {
                    xtype: 'textfield',
                    allowBlank: false
                }
            }, {
                header: 'Phone',
                dataIndex: 'phone'
            }, {
                header: 'Work',
                dataIndex: 'work',
                width: 130,
                editor: {
                    xtype: 'combobox',
                    typeAhead: true,
                    triggerAction: 'all',
                    selectOnTab: true,
                    store: [
                        [0,'Engineer'],
                        [1,'Doctor'],
                        [2,'Lawyer']
                    ],
                    lazyRender: true,
                    listClass: 'x-combo-list-small'
                }
            }],
            selType: 'cellmodel',
            plugins: [
            Ext.create('Ext.grid.plugin.CellEditing', {
                clicksToEdit: 1
            })],
            height: 200,
            width: 200,
            listeners: {
                cellmousedown: function(grid, td, cellIndex, record, tr, rowIndex, e, eOpts){
                    grid.editingPlugin.startEditByPosition({row: rowIndex, column: cellIndex});
                    return false;
                }
            }
        });


       
        Ext.apply(me, {
        layout: 'border',
        title: 'ZyWALL Serial',
              id    : 'viewport',                                  
            items: [{
                xtype: 'box',
                id: 'header',
                region: 'north',
            baseCls:'x-panelt',
            height:50            
            },
             Ext.create('zldapp.view.treepanel.treepanel')
         ,{
                 
               xtype:'zytab',
               header:false,
            region:'center',
            id: 'content-panel',
            bodyStyle: 'background:none;',
            layout: 'fit',
            border: false,
            margins:'0 5 5 0',
            items:[
                    {
                             id: 'dashboardForm',
                        header: false,
                             border: false,
                             items: [editorgrid]
                        
                    }
                
            ]
            }],        
         renderTo: Ext.getBody()
        });             
                
        me.callParent(arguments);
    }
});