That section (Download) has a number of bugs. If you leave it with the month but no day, you get a list of sales for the month. In theory, if you pick a day and click "View" you'll see just the sales for that day.
What I've seen is that I'll see different numbers of sales for a given day (yesterday, Nov 22, for example) if I look at the monthly list from what I see if I pick that particular day. And if I look at today's sales, I see some at the end of the monthly list but zero if I pick the 23rd from the date drop down. It would also be nice to be able to see the list in reverse order (most recent first) and see the total downloads for that image in the list. You can see that if you click on the thumb and display the image's page.
So the list is OK, but pretty flaky.