Views Grouped Filters turns Radiobuttons into Select? I have a grouped filter in a view with lets say 3 items. For the Widget i choose Radios and Allow multiple selections. For 3 Items everything works fine and i have some checkboxes. Wenn they are more then 3 items instead of checkboxes there is a select list! But i want to have checkboxes. Even Better Exposed Filters only shows select as an option for that filter.
Whats wrong ?
I  came up with writing a simple hook:

 function  MY_MODULE_form_views_exposed_form_alter(&amp;$form, &amp;$form_state, $form_id)
  {
    if ($form['#id'] == 'MYFORMID') {
      $form['field_MY_VALUE_FIELD']['#theme'] = 'select_as_checkboxes';
    }
  }