Google is correctly displaying the menu elements, but it seems like the other metadata hasn't populated yet. Allow me to show what Google is actually showing so others can get a better idea of this behavior:
So five things:
THING ONE: Google Sitselinks are what we're talking about here. They are automatically created by Google, and they're the tiny subheadings/internal links beneath the main URL. Read up: https://support.google.com/webmasters/answer/47334?hl=en
THING TWO: When the Sitelink behavior isn't working correctly, you can demote a Sitelink, which is certainly an option at this stage.
THING THREE: @bart is right. Google may just need some more time to crawl your page and properly locate the metadata. You can use Google Webmaster Tools to manually highlight data on the URL of How It Works. This will help Google crawl and display the correct information.
THING FOUR: Quick note about ALL CAPS. Menu elements, or really any ALL CAPS elements should be written regularly, with ALL CAPS enabled via CSS. Right now you have OUR SERVICE, HOW IT WORKS, etc. Change those to Our Service, How It Works, etc., then modify the style to enable all caps.
THING FIVE: Your footer is great as you're using a Webflow symbol to ensure it's consistent across all pages, but your navbar doesn't seem to have the same structure. Save time on changes (like the one in Thing Four) that might otherwise take you a ton of time by using symbols for as much as you can!
Edit: Can't believe I forgot to write this. I AM LOVING YOUR DESIGN. Especially the menu bar.