Hey Nhong,

I am really sorry for the delay of this reply as it is a weekend for us here. I have checked your site and it looks like in your category settings, it uses a different settings for the entry layout rather than the global settings, http://take.ms/Yabh9

I have now configured it to inherit from the global view settings, http://take.ms/BIuqV and it is no longer showing the related posts

By the way, when I was trying to save the settings, I realized that there is an error generated by your editor pagebuilder2, http://take.ms/3fAS1. I had to change the default editor to TinyMCE and only then the saving worked.

You should get in touch with the guys from JSN to look into this