Justification not working with Format disabled

Hi,
I found a problem in ckeditor 4.1, when I customize the toolbar (config.js) and delete the item 'Format' in 'styles', the justification bar (left, center, right,block) does not work, it turns light gray and not linkable. Why?

Code:
 config.toolbar = 'MyToolbar';
 config.toolbar_MyToolbar =
 [
  { name: 'document', items : [ 'NewPage' ] },
  { name: 'basicstyles', items : [ 'Bold','Italic','Underline','Strike','Superscript','RemoveFormat' ] },
  { name: 'styles', items : [ 'FontSize' ] },  // deleted 'Format'
  { name: 'colors', items : [ 'TextColor' ] },
  { name: 'paragraph', items : [ 'NumberedList','BulletedList','-','JustifyLeft','JustifyCenter','JustifyRight','JustifyBlock' ] },
  { name: 'clipboard', items : [ 'Cut','Copy','Paste','PasteText','-','Undo','Redo','-','Scayt' ] },
  { name: 'links', items : [ 'Image','SpecialChar','Link','Unlink' ] },
  { name: 'document', items : [ 'Source' ] },
  { name: 'tools', items : [ 'Maximize' ] }
 ];