Checkboxes in admin view are not well aligned with labels

<label for="indexcustom_wiki">Wikis (comma separated list of wiki identifiers)</label><input id="indexcustom_wiki" name="action" type="text"><br>
<label for="indexcustom_hqlFilter">An hql where based filter query</label><input id="indexcustom_hqlFilter" name="action" type="text"><br>

<label for="indexcustom_clearIndex">Clear the index before stating to index</label><input id="indexcustom_clearIndex" name="action" type="checkbox"><br>
<label for="indexcustom_onlyNew">Only index elements not already indexed</label><input checked="checked" id="indexcustom_onlyNew" name="action" type="checkbox">