Here's the thread in question, twyngwyn.
In particular, this (below) might be the explanation.
@chameleon54 wrote:
@wilmajames123 wrote:
This first happened to me about six months ago. Everything I sell is "one-of-a-kind" and when I was unable to find an item that had sold I panicked. It was some hours before I realized that the item had been bought a few weeks earlier by the very same US buyer. I called eBay, and after a long time on the phone and being passed from one person to another, I was patched through to ebay.com as well. The verdict: it was a very unusual glitch. The next time it happened I was prepared. Strangely, that was also to a US buyer. Now I check every item against listings as a precaution. This is possible as I'm just a small seller.
YOURE RIGHT !!! ......... ( lightbulb suddenly goes on ) .....I Hadnt noticed it before you pointed it out, but both of my mystery relists where purchased by U.S buyers too.
