Somebody doesn't know how to count - Amazon Instant Video edition

There are lots of examples out there of systems not knowing how to count. I know that I have problems from time to time with Google Reader of it misrepresenting how many unread articles I have, for example. But today I found something that is closer to my control: Amazon Instant Video.

It's the end of the year, so it's time for the reports on the top of the year. So here is the top 20 best rated movies by customers on Amazon:

And yes, you are not crazy: there are only 16 of them. How fascinating! It's so easy to get this one right!