Subcategory, not showing on page correctly

Hi Guys, just wondering if anyone has any idea what I did wrong with this?

I added a subcategory, and it wasn't showing on the page, only to find out that it wasn't formatted properly. I had a black background, but had to change it so see that section, but the alignment is also not consistent with the rest of the template?

I can probably fix it so it shows, but that means I will also have to change the background color of the whole page..

Anyways, my question is, is this a known bug? or did I do something wrong? am I missing something?

Any tips is truly appreciated, thanks!