Originally Posted by
Fitch
Ours didn't post after 2 weeks so we submitted missing partner Avios forms and everything posted correctly in <24hrs. Luckily in our case the QR computer said YES, but I agree it's hardly rocket science to swap pax details thus more than a little irritating for us to be assumed guilty before being proved innocent

It isn't rocket science, but there are data protection requirements and legacy systems involved and if a batch of data went astray people would be straight on here to complain.
There must be millions of these transactions every year, 99.9% will go smoothly but inevitably there will be occasional issues. I saw mention of a typhoon on the cross posted thread, perhaps some IRROPS issue affected this one.