Playing multiple characters at once

I was wondering if anyone else is going to multi-box and if they are encountering the same issues that I am. I have already installed my 1.0 registration code as I am a legacy member and I purchased another copy to add the registration code to my SE Service account. However, the button to add the registration code to the platform has been removed. Where can I do this? Has anyone done this already? I specifically saw a thread on the support database that indicates this is possible with up to 8 registration codes. I am having no luck with calling, emailing support, or their chat. It has been two weeks now and I was just wondering if anyone has done this yet.

Thanks!

I believe you can add up to 8 registration codes, one for each Service Account, under a single Square Enix Account.

http://support.na.square-enix.com/fa...5&id=5382&la=1

I am also having this issue, please let me know if you get any information on this.

I send an email to their support over 2 weeks ago and another one 2 days ago on this. No replies. Are they not looking at their support emails?