So when ttk came out, my brother bought the collectors edition, thinking that was the only bundle available. He used the code for the actual ttk expansion, and got access to ttk. When I logged on to destiny, I was able to play ttk as well. So because he was the one who used the code on his account, he got the rights to ttk. So because I never typed in a code, is this why rise of iron is not available for me to purchase?