It leaves one question though: why didn't the payment arrive on the address you gave him?
I did not realise this; If I had, I would have used very simple language, and read his comments more carefully, to figure out what he really meant.
He meant to ask me to confirm the BTC Address to send to, again, even though I already given it.
He had not in fact made the transaction but went to bed, awaiting a final confirmation from me, which he thought he had asked for. Combination of language problem and lack of question mark just made the comment turn out wrong for him.
It sounded as if he had sent the BTC and wanted confirmation that it had arrived.
The language barrier and the different time zones are what caused this misunderstanding. Although it is very clever from the seller to ask for a confirmation of the address, in such cases it would be even better to sign the address. Those who become victims of clipboard malware often blame the seller for cheating on them, though they may be completely innocent.