Hi Jason, I put in a ticket and this is the response I recieved:
Because this is a custom implementation, this issue is going to be beyond our scope here in support. Since the embed code has been included multiple times on the page, we can see that the issue is not related to Marketo's embed code. In this case, I recommend working with your developer for further troubleshooting with this implementation and design.
The way that page works is that when you click on each one of the tabs, it hides the other tabs. So technically, the code is on the page three times. But for some reason the Marketo code is not being hidden the way the rest of the tab is.
Our developer has worked on some other creative solutions, but strange that this was the only part of the page that wouldn't hide.