The permission TEMPLATE is for you to define a basic set of permissions that can be copied to new/other forums.
If you're copying the permissions FROM one forum TO another it will take ALL permissions from the source, it won't just cherry pick specific ones. So if mods are able to delete posts in forum a and not in forum b, and you copy the perms from forum a then mods in forum b will now be able to delete posts.
I'm not really understanding your concern on this post.
