I am currently on memory 5 sequence 3 (not too far along past the horse chase with Leonardo Da Vinci), actually went to a couple of Viewpoints in Venice, and completed an assassin's tomb. Then I quit the game.
I started it up again and it only lets me load some save from tuscany, memory 3....anyways, hours and hours behind where I currently am. When I check my DNA, it says that I'm up to where I should be (showing I completed 5-3) and when I try to load the memory, it tells me I need to be at a memory start to load it (not exact words). Am I missing something here? Any help/advice would be greatly appreciated.