If I login on the iTC app and just do summary, I see the apps downloaded within a period of time. One app just came out in December, so I click on 13w to get the full range of the time it has been on sale. It shows that app with a number of about 700. If I click on it, choose the same time range, and click on weekly totals and add them up, it only comes out to about 630. Which numbers are right?