I agree that what you pay to AP should be reflected on the printed postage sticker that AP attach to your parcel.  There should be no discrepancy between what has been paid and what is on the sticker.  

Maybe there should be two stickers - one for actual postage, another for additional services paid for.  That way buyers would have no doubts that what they have been charged is fact.  

And that message from eBay -  What a load of crock...!!!  Unbelievable!!!