Portfolio Grid glitch

Here is a page I’m using for a portfolio page: Website and for some reason it will grid it out perfectly for 4 images and then bunch the next two pairs side-by-side. I’ve tried uploading in different sizes, ways, and images and nothing has stopped this from happening.

I’m not sure what to do to alleviate this problem. I believe I have it all set properly, I’m using the 4 column portfolio page with the Cudazi Mono theme. Let me know why the fifth image won’t go down to the next row like it should be?

Thanks in advance.