Pakesi Carrying Case Compatible with Pokemon Trading Cards, Cards Collectors Album with 20 Premium 12-Pocket Pages, Holds Up to 480 Cards

I purchased and it does not hold 720 cards as advertised. It only holds 360. Can you explain how its supposed to hold 720 ?

This binder said it had 720 slots to hold cards. When it was delivered, it only had 400.and cards did not fit good.