Rubbish subject header so apologies for that in advance, just didn't know quite how to summarise the problem.
I bought a couple of DVDs on eBay, and requested an invoice from seller with combined postage. I paid and they turned up today.
Filling in the feedback form ice noticed that they are both listed as Free postage. I paid postage and remember postage listed on the advert.! The seller charged me me double what it cost her to post them which was why I was going to give less than full stars.
Any ideas what's going on?