why EBay taking fees on postal charges which are not actually made due to combined postage deal

[jasonsdad]

I sell individual Lego models at low prices and the majority of buyers tend to buy multiple items as I advertise combined postal charges.  As an example my postal charge is £1.15 per item, but often I can sell 6 to 8 cheaper items and put all into same envelope and still charge total of £1.15.   However as each item was sold separately 8 items would attract a total postal charge of £9.20.before I adjust via the invoice.  This is the amount E Bay levy their fees on,  so 92p.  However the customer pays just £1.15 in total so I am overcharged on fees week in and week out and I do sell a lot of combined items.   If this a fair and/or correct practice ?

   Thanks              Brian

[vijorey · Accepted solution]

If you send an invoice with adjusted postage that is all ebays fees are based on..

have you looked on your account to see the exact fees that you have been charged?

the only thing I can see as being unfair/ incorrect practice is that you are an unregistered business seller and trading illegally on eBay. 

you need to upgrade your account with urgency