CSM111: if I have balls in my closet EXACTLY LIKE THE ONES I AM USING IN CURRENT ROUND. When I hit my last ball in bag it will let me use the exact same balls that are in closet!
Not quite, I'm afraid:
All the "exact same balls" are in your bag (hundreds, it you buy them), but those of the same type in, say, different colour aren't - they are not "exact same" and banned to the closet.
Think of article numbers (which they probably have) - only one in the bag!