IDX Broker custom code breaks my formatting?

Site URL: https://marigold-tangerine-39gs.squarespace.com

Hi folks:

I'm migrating a website to Squarespace for a real estate company. They use IDX Broker. 
IDX Broker creates a wrapper, so that all the pages it generates come with the default formatting of your site. Cool!
In Squarespace, you just create an empty page (keeping the header and footer), then add one simple code injection to the page:
    <div id="idxStart"></div>
    <div id="idxStop"></div>

Awesome!

Except...when I actually view a page generated using this wrapper, it breaks much of the custom formatting of my Squarespace 7.1 site. You can see that my clicking the "BASIC SEARCH" link in the menu bar.

I looked at the HTML, and I can see lots of things happening, but...I really need some help! 

Thanks for any ideas,

-Stephen

Hi Stephen - looks like you got things to re-direct.

But I see that is what you have now .... a redirect to a 3rd party site - there is no content on the clients Squarespace site or domain anymore. 

For future reference, it is possible to completely avoid this and embed IDX content seamlessly on Squarespace website pages - in and amongst other content on the page to create a beautiful layout.
Here's an example Squarespace site- https://www.wendyblake.com/
And a more comprehensive overview of what you could do: https://charliesmithrealty.net