Multiple forms on one page cause tabindex problem

I have two forms on a page, one in the post content and one in a sidebar widget. Gravity Forms is setting the tabindex of the fields sequentially (1, 2, 3) in each form. When a user hits tab from the first field of the first form, it takes them to the first field of the second form ... which is a usability nightmare for site visitors.

I got around this by adding a PHP widget, using the shortcode, and hacking around the output ... but it should be easier than this:

<?php

$form = do_shortcode("[gravityform id=4 name=PartyClub title=false description=false ajax=true]");
$form = str_replace("tabindex='", "tabindex='100",$form);
echo $form;

?>

That's a little easier, but that doesn't seem like something you should have to write PHP to accomplish.