Look, you aren't guaranteed all the items because even in the map when it has one exit and one end, there are hidden paths and forks in the road. You go one way, you don't get the item. Do I have this completely wrong? There are plenty of times when I was like, this direction looks like it furthers the story, so I'm going to double back and check what the other one was, and then I find the item.
It does this many times, especially in the crystal portion.









