Does creating a directory at the top level also create a Share?

I submitted this question to the Unbalance group but I think it's not really a question about Unbalance. So I thought I would try a wider audience.

What I am trying to do is move some directories (and the directories and files in them) from one disk to another.

One disk is in one share and the other disk is in another share.  The problem is that Unbalance wants to copy starting from the top level directory.   I think this will actually "add" this disk to the share, not what I want to do.

Here are the details:

I want to do something but I am not sure that Unbalance is the right tool

Here is what I want.

I have two shares:

Backup1 - consisting of only 2 disks (disk4 and disk10)

Here is the definition of Backup1

Backup2 - consisting of one disk (disk1)

I want to move some (but not all) files from disk4 to disk1, that is, from share Backup1 to share Backup2.

When I set up Unbalance and run the dryrun I get this:

So it will copy files from /Backup1/backups/ ... on disk4

to /Backup1/backups/...  on disk1

This is not what I want.  I want the files copied to /Backup2/backups/... on disk1

So, can just run this Unbalance command and then just change the name of directory Backup1 to Backup2 on disk1 

like so:

cd /mnt/user/disk1

mv Backup1 Backup2

Does this automagically make the files available only on the Backup2 share?

I confess that even after using Unraid for over a decade, I still don't fully understand how the shares work.

I *think* that any directory at the top level of *any* disk creates a share but I may be wrong.

Any help from the experts would be greatly appreciated.

Thanks.