You can see the horses are not being listed in alphabetical order. When I check the underlying HTML I can see that the order of the HTML elements is not the same as how they are displaying on the page. For example, the 4th article element is displaying in the 5th position, the 5th in the 6th and the 6th in the 4th.
It was set to masonry which even when its set to Order by title in alphabetical ascending order, it doesn’t do that. You might want to look into that or at least put a message saying that masonry mode will not display posts in title order no matter what.