Banner Position issue

I'm using a custom module in the Banner position and I only want it displayed on the Main Page and it is the only one selected. However, when I go to read an article inside the PageBuilder generated page, I see the banner. Now the Section doesn't show it, and neither does the intro, just when I click on the artitle title or read more do I see that banner. How can I prevent this from happening? Here's a link to the Menu Item and if you click on either of the test articles, you'll see what I' mean...

https://ewma-wa-ieew.org/index.php/around-the-chapter