me neither mate, I've never seen that screen I posted up the page before.
Only other thing I could suggest is maybe try re-installing the Steam client, and see if that helps in anyway.
---------- Post added at 02:11 PM ---------- Previous post was at 02:10 PM ----------
It's because they can't check if the activation code has been used. They won't replace it, because people would just go in and say it wasn't working and get a new one all the time. You will have to contact SI or Steam.
Ah I see. That explains it then. Saved a return trip to Game then. But this one has got me baffled tbh. Never come across this one before