Not sure if she checked both items out together or not but this is the point, the whole system is totally inflexible. I paid for the label(s), not the buyer so I do expect a refund.
If I do decide to stay with Ebay then I will have the buyer pay for postage on all listings to save having any further fights.
In any case, one item here was simple delivery and the other wasn't as I was able to choose between simple and custom until two days ago so I had a mixture of both the old and the new.