It looks like you had ‘height’ set to scale, which was resulting in some of your document getting cut off. For making your larger layout to expand to fit your viewport size, I recommend setting scaling on a group which contains all your elements, and just doing scaling on the ‘width’ dimension. Check out the attached doc:
HR Interactive-Hype-v1e.hype 2.zip (628.5 KB)
So you would need to re-adjust your layout for each of your smaller layouts to use this method as well. BTW the method I’m using to test the layouts is Safari’s Responsive Design Mode.
Here’s more info about what’s happening: