Why is Amazon not showing every item that is purchased with your affiliate link?

Since yesterday I noticed that there are items that are not shown in the list of sold items using your affiliate links. They show the total number of all the items sold, but you can see that some items are not listed, so you cant see which item was sold. Why is Amazon doing this? Is this not a transparency problem? I do have the right to see every item that are sold using my affiliate links, since its also money to Amazon!