I see where your confusion is coming from. When you look at "report by time period" if you are filtering by "day" our datebase only holds subscription data for the past 3 months. In order to keep the load of the reports manageable, this data rolls for 3 months.
That said, if you look at the "report by time period" and filter by "month" you'll see all of your subscriptions and earnings since joining RevResponse.
Joined: 2008-12-08