Odd Formattting Issue

Looking at those 2 pages, it seems they use different templates. The FAQ page uses the full-width page template, while the testing page uses the full-width-form template.

It looks like the template for the testing page could have been custom coded to have that box with the registration form link on the right. So I’m not sure you’d want to switch page templates. But you could try to see if that resolves your issue.

If changing the template is not an option for some reason, you could try adding this CSS code to the ‘Custom CSS’ field in your theme’s customizer:

.page-template-full-width-form-page #content-full {
    margin: 28px auto;
    background: #fff;
    width: 90%;
    max-width: 1100px;
}

And that should make your page start to look like this: https://ibb.co/yVh2W72

I hope this helps