Ooooh bugger. So you were
I have an excel spreadsheet with all the matches cross referenced with squillions of little coloured boxes - unfortunately, one or two names seems to have been transposed this time round between the spreadsheet and the Word doc where I assemble the matches for each round.
Human error - cock-up, not conspiracy.
You're right - no-one is supposed to fight the same opponent twice.
Unfortunately, I think it's now too late to do anything about it, so very sorry about that.
(It's actually the second time that's happened. We had a rematch in Round 3 as well - but I don't think anyone noticed! On balance, 2 mistakes out of 160+ matches isn't too bad an average... But I'll double and treble check all matches for the final three rounds... )