Need help changing frontpage behavior using Hueman template

Whenever I post articles that I only want to show in certain categories of my site, they appear on my homepage as well, which I don’t want. How can I correct it so that my frontpage remains unchanged and all new posts to only appear in the categories I choose?

Here’s my site: https://www.onlinecasinos.fm. And as you can see, the Kungfu Fun Slot Live and Slots.lv posts appear near the top of the homepage as well as in my chosen category.

Any help is appreciated.