Issue with the Collage image not been center along text

Site URL: https://visuatest.squarespace.com/

I want my image to be in the center to reference the text box like here (the first one with the tablet). But for some reason, the other images are really on top and not in the center like the 1st one.

Password to see the page is Visua

Which page? I don't see it on homepage

Thank you so much! You have helped us a lot, and by that, a lot. Is a pain learning CSS but you have been so helpful. Thanks!