In case you generate SCAN forms for Express 1 and you receive several forms, this is most likely caused by the fact that Appath has multiple servers that are linked to Express 1 meters.
Therefore, while Appath will try to always use the same one for all your shipments, if one is not available, all requests will get rerouted. Therefore, you will most likely receive multiple SCAN forms for Express 1.
However, they will still be accepted by the carrier, since all info is present for all orders.