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The item grid height depends on the content height. If you have different titles, the only way is to set a fixed height for the title that would cut the long titles.
If you want to cut titles this way, please provide the page URL and we will give you custom CSS.
Thanks for the reply, but I know how to truncate titles.
The image height was causing problems too, so I added a max-height code to .blog-post-loop .entry-header.