It displays in a large format in the Designer (how I want it to display), but when on the dev link, it shows a much smaller version…have I missed something?
This is due to the Scroll interaction you have on the page. Part of your interaction sequence is setting the height and width of the link block that contains the logo in your nav bar. Should be able to easily fix this by changing the width and height in your scroll interaction at 0% for Link Block.