Catalog Copies

Hi,

I am configuring catalog backup.
In Attribute, I selected policy storage 'BkpTape'
In Multiple copies window, I selected copy1 to 'BkpTape' and copy2 to 'BkpDisk'

Does it mean, I have 3 copies? 2 in BkpTape + 1 in BkpDisk?
How to make 2 copies only? 1 in BkpTape and 1 in BkpDisk (as I seen min copies =2)

Thanks,