Theme displaying strangely in IE

I'm using the BeautySecrets theme and my client is using Internet Explorer to view the website. When I view it in my Internet Explorer (version 10) it shows up fine but when she views it the template does not display correctly. It puts the side bar up under the logo and pushes the content down and spreads it out. Has anyone else had trouble with Internet Explorer displaying this template incorrectly?

Thanks!
Ashley

I figured out that in top.php the code was wrong. The second line for smt_mobile_menu had the wrong closing comment tag and only 2 dashes not 3.

Wrong code [is what is the default for this template]:

<div id='header-block'>
			<!--- <?php smt_mobile_menu('sec-menu'); ?> ---!>
		<?php smt_mobile_menu('main-menu'); ?>

it should have been written this way [correct code]:

<div id='header-block'>
			<!-- <?php smt_mobile_menu('sec-menu'); ?> -->
		<?php smt_mobile_menu('main-menu'); ?>

Also, I found out that IE 7, 8, 9 display slightly differently than IE10. But this fixes the major layout issue. I hope this helps if others are having trouble.

Thanks,
Ashley