Popover Blocking and Style Issues

What's the situation with this plugin and getting blocked by users. So far I always see it, but I'm just curious about how this works.

I'm having trouble with the look of it too.
(I'm using code from mailchimp)

It's popping up, but, it does't seem to be taking on simple styles. For example, it's not taking on my h2 style.

I tried to add the link rel code to the stylesheet in the code for the form, but that didn't work out so well :slight_smile:
When I do this, the style seems to be applied in my backend, but not on the live site.

Any advice would be appreciated.

Thanks so much!

Susanna

P.S.
Here's the code:
<!-- Begin MailChimp Signup Form -->

<link id="style-css" target="_blank" href="http://kisswedding.com/wp-content/themes/u-design/styles/style1/css/style.css?ver=1.9.0" rel="stylesheet" media="screen" type="text/css" /> <link id="custom-style-css" target="_blank" href="http://kisswedding.com/wp-content/themes/u-design/styles/custom/custom_style.css?ver=3.5.1" rel="stylesheet" type="text/css" />
<div id="mc_embed_signup"><form class="validate" id="mc-embedded-subscribe-form" action="http://kisswedding.us2.list-manage.com/subscribe/post?u=c22e48b052b62fd19d9683fbf&id=1cc77b9de4" method="post" name="mc-embedded-subscribe-form" novalidate="" target="_blank">
<h2><img class="alignleft wp-image-8801" alt="printable-wedding-planner-checklist3" src="http://kisswedding.com/wp-content/uploads/2013/05/printable-wedding-planner-checklist3.png" width="234" height="305" />Join KISS and Get the {Free} Printable Wedding Planner Checklist</h2>
 
<div class="indicates-required"><span class="asterisk">*</span> indicates required</div>
<div class="indicates-required"></div>
<div class="mc-field-group"><label for="mce-EMAIL">Email Address <span class="asterisk">*</span></label>
<input class="required email" id="mce-EMAIL" type="email" name="EMAIL" value="" /></div>
<div class="mc-field-group"></div>
<div class="mc-field-group"><label for="mce-FNAME">First Name </label>
<input id="mce-FNAME" type="text" name="FNAME" value="" /></div>
<div class="clear" id="mce-responses"></div>
<div class="clear"><input class="button" id="mc-embedded-subscribe" type="submit" name="subscribe" value="Subscribe" /></div>
</form></div>
<!--End mc_embed_signup-->