Multi Image CMS looks a Mess!

My client is using Multi-image for a gallery, and although they are grouped in 3s and she is keeping the same sized images together it often looks a mess, look at Sketchbooks, Drawing from Life to see what I mean. She wants it to look more uniform, can anyone help.


Here is my public share link: https://preview.webflow.com/preview/the-art-house?utm_medium=preview_link&utm_source=dashboard&utm_content=the-art-house&preview=d4266976f7f7b5aed569fcf262efab16&mode=preview
(how to access public share link)