Thank you for providing the information.
When I view your site on Mac or Windows and with differant browsers, the masonry looks OK and does not overlap.
Could you temporarily disable the FAQ plugin to see if it is conflicting?
Also in your child theme you are loading the parent stylesheets like so:
@import url("../trusted-pro/style.css");
@import url('../trusted-pro/css/header-1024.css');Could you remove or comment out these two lines and see if that makes any difference. You do not need to load the parent stylesheets like this, as they are already loaded by the fact that the parent theme is installed and your code is making them load twice.