diff --git a/jquery_update/replace/tabledrag.js b/jquery_update/replace/tabledrag.js
index a64b9a7..223890e 100644
--- a/jquery_update/replace/tabledrag.js
+++ b/jquery_update/replace/tabledrag.js
@@ -112,8 +112,9 @@ Drupal.tableDrag.prototype.hideColumns = function(){
     // Hide the column containing this field.
     if (hidden && cell[0] && cell.css('display') != 'none') {
       // Add 1 to our indexes. The nth-child selector is 1 based, not 0 based.
-      var columnIndex = $('td', cell.parent()).index(cell.get(0)) + 1;
-      var headerIndex = $('td:not(:hidden)', cell.parent()).index(cell.get(0)) + 1;
+      // Match immediate children of the parent element to allow nesting.
+      var columnIndex = $('> td', cell.parent()).index(cell.get(0)) + 1;
+      var headerIndex = $('> td:not(:hidden)', cell.parent()).index(cell.get(0)) + 1;
       $('tr', this.table).each(function(){
         var row = $(this);
         var parentTag = row.parent().get(0).tagName.toLowerCase();