Ok, I have noticed something just recently that I had noticed a while back. I have a couple pictures to help me explain, since I totally suck with words. Ok in the first image, you see that bar thing from Zelda 3? In the second it is highlighted pink in the ZQ editor. Everyone knows that this is because it is solid, and Link cannot go through it. Now for the problem, see, Link can't go through, but enemies and walk vertically through this. I have observed this many times over.