I printed out the early access codes from the red button on the right of the "My Profile" page on my Square Enix EU e-shop account after pre-ordering both 1 boxed CE and 1 digital CE (2 codes), and didn't realize I also received them by e-mail at the time (thanks to GMail burying it in the "promotions" inbox). In the meantime, I located the orignal e-mails, which match the codes I printed from the website, and sure enough, I got a new pair of e-mails today, with codes that don't match. I can't check my codes under my Square Enix Account profile anymore because the button's been replaced with a FFXV demo survey.

Guess that means I'm affected by this issue. Let's hope nothing goes wrong with the 3rd e-mail sending, and/or registration of the new NEW codes.

*fingers crossed*

Please keep us informed when the new batch of e-mails have been sent out so we know which is which.