I sold an item yesterday that included postage for a 2 kg parcel, £4.06. I purchased the postage from the sold screen and it was only when I printed the label I noticed it was for a 1kg parcel. I went back into screen and sure enough £4.06 was specified in the sale but £2.94 had been deducted from profit. I've sent the parcel and fully expect to get charged more but the fault isn't with me but the EBay system.