Safari is telling me - Failed to load resource: the server responded with a status of 404 (Not Found) (for the jQuery.min.map.js file). Maybe fix that first.
The "blob" is positioned where you see it because of this rule -
.templatemo-content {
position: static;
overflow: hidden;
margin-top: 36%;
}
It's the top margin that is killing you on the home page. Since the blob contains the only real content on the page, and since you have set the background image to fixed, the only thing left to scroll is the content section. I don't like that arrangement.