Since Yesterday, PayPal is not sending us confirmation notification of the payments. So the system is unable to update the status of the accounts. We could do this manually, but when PayPal will solve the issue, it will probably send all the notifications and this could create worse issues. So, we are waiting for a while. If nothing happens, we will fix the updates manually.
UPDATE, Jan. 29. The strategy worked because PayPal sent all the notification at one moment, and all the accounts have been upgraded correctly.