Yesterday, as of the creation of this message, had the daily mission "The Archive" as a daily mission. It required killing Simik-3 on heroic. When I went to begin the story mission, I remembered I had a previous save PAST Simik and had to restart. Now, I'm not sure if this is meant to be in the game, but when I went to restart it, it wouldn't allow me to restart on a heroic difficulty. I would hit "X" to restart and it would set me back to the normal level setting, but when I set it the same heroic level I had with my last save, it would just load up my previous save instead of starting a new save of the mission on the same difficulty. But like I said, I don't know if this is meant to be in the game or not. Also, it seems this may be the same with all other missions, too. Note: I am on the 360. Just some extra, info if it's needed, for the Bungie staff.