Marcefe

Hello, I have monthly soiling loss values, the average of these values is equal to 2.2%. Why do I get a higher loss value in the loss diagram of the report, which corresponds to 2.52%? I thought the values in the loss diagram were identical to the specified parameter; is this no longer the case? Or could it be a bug? Or is another loss being considered in the loss diagram that increases the value of the soiling? And if this is the case, what loss would this be? Thank you very much for your help