Doesn't give me the most adjacent post

I am using your plugin to show links for the previous and next posts of a custom post type (Cartoons) which has a custom taxonomy (Artists). However if there are more than one post for a particular day from various artists the plugin gives back the first post it comes to for the next day and not the immediate next or previous posts. For example I have 3 posts for Aug 8th at 7, 8, and 9 AM each with a different artist (category). Then I click the most recent one for that day (9 AM). The previous link should go to the 8 AM post, but it doesn’t. It goes to the first post for the previous day instead (Aug 7th). The same goes if you were going in the other direction. It would go to the next post of the next day (Aug 9th), not the very next post in the database.

Hope this makes sense.
Here is where it is occurring:
https://srnnews.americancreative.us/opinion/cartoons/

Click on one of the cartoons and then use the arrows next to the pic to navigate to the prev or next posts. You’ll see what I’m talking about. Any idea why this might be happening?

https://www.ads-software.com/plugins/previous-and-next-post-in-same-taxonomy/