Bug with radiobutton layout?

Hello, is there a bug with this layout?

Code:

{
                    xtype: 'radiogroup',
                    fieldLabel: 'Type',
                    columns: 2,
                    items: [{
                        boxLabel: 'Min',
                        name: 'type',
                        inputValue: 'MINIMUM',
                        checked: true
                    }, {
                        boxLabel: 'Max',
                        name: 'type',
                        inputValue: 'MAXIMUM'
                    }]
                }

rb.JPG

As you can see Max is put under the radion button. It's the same with all radio button I create.

Is there a way to align it?

Thanks

Bug with radiobutton layout?