Content Module Main Category issue

I created a second content-module on my main-page that's pointing to a newly created root-category in which I added some categories that I want to separate from the rest. But when I publish the module, it's showing the categories from the default shop-category (ID:2), not the ones from this new root-category I created...

I tried deactivating the other module to see if that solved the issue, but... nope...

Kept trying and just discovered that changing the 'Menu' setting in the new content-module to 'none' solved the problem. I had it pointing to the same menu-item as the first module, which seems to cause a conflict...