Usually, you can see a store item's price on a user's "Purchases" tab after a receipt has been validated. However, I found out that one of players somehow performed a purchase with a wrong price (they somehow managed to pay more than a purchased item costs. Paid price doesn't even appear in the store anywhere). I noticed that a purchase row in question says "Client" under a "Price" instead of a "Catalog", like it usually does. I wasn't able to find a documentation for the "purchases" tab, so could you please explain what does this mean?