I've implemented a real lazy loading on my site.
I'm using the portfolio 3 column template, and i'm loading the <article> on window scroll with infinitescroll plugin loading json data and creating the <article> dynammically.
The problem is that the ajax loaded elements are not placed correctly.
I've tried to reproduce your template portfolio-infinity-scroll.html.
The page is visible at this address https://www.chicaj.com/showroom.aspx
The page should look like this https://www.chicaj.com/gallery.aspx tha is implemented with server loading, and works correctly.
Attached you'll find also the js file with the main functions of the lazy loading
