Mailchimp Newsletter Using Code

Hi all! I have a page on our website where I am trying to house our weekly newsletter from mailchimp. I have created a code block and things are working for the most part. We have around 25 newsletters so far and I want the entire backlog on the website. The default "show=" number is 10, but nothing happens when I change that number to 25 or 50 or 5. It continues to only display the last 10 newsletters. Any suggestions? I'll post the code down below. Thanks for any help!

<style type="text/css">

<!--

.display_archive {font-family: arial,verdana; font-size: 20px;}

.campaign {line-height: 125%; margin: 10px;}

//-->

</style>

<script language="javascript" src="//Zachsmithconsulting.us11.list-manage.com/generate-js/?u=c7a6e4fc41df77d9d40410f47&fid=29888&show=25” type="text/javascript"></script>