Hey Massakid,
I can see from the URL you’ve provided that you’ve changed backgrounds for some of the pages (e.g. “Face.M” and the contact form sections). Please let me know if this problem is still topical :)
Regarding the margins between one-page sections: please try inserting this code into the “Style: Add Custom CSS” section of the Theme Options panel:
.page-template-page_one-page-php .page-holder { padding-bottom: 50px !important; }
.page-template-page_one-page-php .page-delimiter { margin-bottom: 50px !important; }
Sincerely,
Andrii / Satori Studio