Actually, I too would like to raise a question about this.
I had XIV added to my Squeenix profile, using the 18 digit code. As of yesterday XIV is no longer on my profile, and the code is reading as invalid. I can't begin the download until XIV is back onto my profile, so what exactly am I to do?
My first thought is when I receive the 20 digit code, I can go to the Squeenix account management system and add the game that way. Is that the solution here?
Star Swirl on Behemoth AKA Best-hemoth AKA The Cool Kid's Table----60AST, 60WHM, 60SCH/SMN, 60BLM, 60MNK, 38 PLD, 34DRG, 31NIN, 27MRD
FFXI- Derpypony on Asura
Check out the Dream Network, a Twitch.tv community for XIV fans, featuring notable streamers like Mr. Happy, MTQcapture, Rahhzay, and Slyakagreyfox! http://dreamnetwork.tv/forum/index.php
Then maybe check out myself, EquestriaGuy, on twitch at http://www.twitch.tv/equestriaguy