To Qiao Su,
Here for the "Approved" count, the first time the case is changed from a non-approved status to approved status, it will be counted. and after that, the case won't be updated anymore.
As the crawler is running on a daily basis, there are chances that the first time seeing an Approved status is "Case Approved" or "Card Was Produced". But no matter what approved status was captured, it only counts once and after that, the case won't be updated in the system any more.