After we have investigated, we have noted your complaint but we afraid that the problem did not occur form us. Because our worker usually weighed a dispenser on the scales before put it into the carton and QC will randomly check the weight of dispenser every hour. If a dispenser has only one roll, the weight of dispenser will be missing about 2.7 KG. Therefore, we are sure that our worker must know while lift a dispenser into the carton