I have got the Bungie mobile app and it says there are no accounts link to Bungie.net yet I have linked my Xbox, PSN, google, and Facebook accounts yet there is still nothing. Also when I click on legend on the mobile app it says I have not played Destiny, but I have played alpha (watch the video for proof) so if anyone can please help. Thank You.
That accounts link is specifically referring the Destiny Game Content through the mobile app. Wait until the tomorrow when the beta goes live again and give it a refresh!