views grid shifts right in narrow,wide but not mobile

I created a page using views to display a grid of images. I am using omega as the base theme and have built a sub theme from that. When I view the page in normal view the grid shifts to the right of the page, and when I shrink the page to mobile size it shifts back. What element is causing the shift? Where do I need to make the edits in css or at the theme setting level?