We are using this plugin https://github.com/kfuchs/permission2categories to hide post with an "建築家のみ" category (This category is for admin only, I attached screenshot) from other users, but this plugin has not been updated for 3 years.
If you will go to this link http://kenchiku4.com/index.php?qa=questions&start=6 you will see that some post is not here but you can select the "2nd" page of the pagination but If you login as an admin you will be able to see that there is a post on the 2nd page. The reason is that some post in 2nd page has a category for "admin" only.
We set that there should be 6 posts per page in the pagination.
Has anyone encounter this before and how do you fix it? It would be great if you could help me or suggest something.