Relcat links cannot contain spaces. The best way to get the category path is to cut and paste it via the public side. Do not include http://yoursite.com in the path. To delete a relcat link, simply remove it from the box. Links must be placed one to a line.
When categories contain similar content, a Related Category link (relcat link) can be used to link the two. Only one is created in the category from where the relcat link is hit. If the two need to be inter-linked, an additional link is needed.