I need to begin Sequence 14, but the game says that I am missing 2 codex entries, which I need to access the sequence. It also says that these missing entries should show up on my map to show me where to go to get them, but they don't. In fact, I don't see any codex entries, even when I turn all other legends off. Also, Leonardo doesn't show up anywhere on any of the maps either. Please help. I have checked each area about 3 times and cannot find these codex entries. Also, I have every viewpoint synchronized too.