I won two items (a G1 Kup and Scavenger) from one seller and received an invoice including $16 shipping.
I questioned it and got this reply:

Since I listed thiese items a whle ago, I had already packaged them for poastage, bfore this auction. They will be sent separatly. Thus $8 each.
The Ebay invoice system won't let me make two separate invoices. - Thus, it looks like they are being shipped together for $16.

So because the seller can't be bothered to repackage them I've got to pay for postage twice.
I've already paid for them to ensure I get them (by paypal this time!) but rest assured when they arrive I will certainly speak my mind, both to the seller and Ebay.