jens, I've had showing on my PayPal receipts a couple of times 'Receipt for multiple payments' when sending one payment to the same seller for multiple items (also on my laptop), so I suppose they would have received multiple payments when I only sent one?

In my instance, I won a few auction items over a couple of days, the seller invoiced for the first two, then I paid as soon as I won the third - they were all free postage so I didn't bother waiting for a new invoice. At checkout, it told me that the two grouped items reflected the items I had requested an invoice for, and there was a link to request an invoice for the third one. I wonder if it's to do with the cart system we don't have as yet, because on those receipts it mentioned those two items as being in my shopping cart. ?:|