Hi aseruserwood,

Thanks for reaching to us.

1. Because these menu items have the SAME categories link. https://prnt.sc/9Nw7BaMZ1GPb

Go to Products > Categories, click on Quick Edit to edit its Name and Slug https://prnt.sc/Tw6G_DZS-UhB

2. Navigate to Appearance > Menus, select Main navigation and you can add / remove categories https://prnt.sc/phoHSRov1acW

Regards,