Hi Matt,
Try to edit your "includes/view-functions.php" file and go to around line 2379 ~ 2392, you'll see these code :
<form id="form_{$form->id}" class="appnitro" method="post" action="{$_SERVER['PHP_SELF']}">
<div class="form_description">
<h2>{$lang['review_title']}</h2>
<p>{$lang['review_message']}</p>
</div>
{$entry_data}
<ul>
<li id="li_buttons" class="buttons">
<input type="hidden" name="id" value="{$form_id}" />
<input id="review_back" class="button_text" type="submit" name="review_back" value="« {$lang['back_button']}" />
<input id="review_submit" class="button_text" type="submit" name="review_submit" value="{$lang['submit_button']}" />
</li>
</ul>
</form>
then replace the code with these one
<form id="form_{$form->id}" class="appnitro" method="post" action="{$_SERVER['PHP_SELF']}">
<div class="form_description">
<h2>{$lang['review_title']}</h2>
<p>{$lang['review_message']}</p>
</div>
<ul>
<li id="li_buttons" class="buttons">
<input type="hidden" name="id" value="{$form_id}" />
<input id="review_back" class="button_text" type="submit" name="review_back" value="« {$lang['back_button']}" />
<input id="review_submit" class="button_text" type="submit" name="review_submit" value="{$lang['submit_button']}" />
</li>
</ul>
{$entry_data}
<ul>
<li id="li_buttons" class="buttons">
<input type="hidden" name="id" value="{$form_id}" />
<input id="review_back" class="button_text" type="submit" name="review_back" value="« {$lang['back_button']}" />
<input id="review_submit" class="button_text" type="submit" name="review_submit" value="{$lang['submit_button']}" />
</li>
</ul>
</form>
it will add/duplicate the buttons on the top of your form data in review page
MachForm Support