Is this normal? (Alttp question)

[KentaRawr!]

A year or so back I realized that my copy of Zelda: A Link to the PAst (GBA Version) was boot-legged. Sadness over-came me, but I played it again and didn't care. I haven't played it for a while. Now, I have prepared for the ultimate lazy time. At least for me. I got a sleeping bag, put 2 blankets inside the sleeping bag, stacked 4 pillows for teh extra cumfort, and got some snacks and a drink. It was chocolate cookie bears for the first dungeon, Reses Cups for the second dungeon, and a marshmallow bar... thing for the 3rd dungeon. But when I went into the castle, I noticed some oddities. When the guards pass one another, the sprite above always over-laps the other sprite, but it looks like the one on the bottom should be over-lapping the one on top, due to the positioning of the camera. Then I walked up to a guard. It doesn't sense any colision until I touch their heads. I can't even slash their bodies! Only the heads. And they still over-lap me if I'm below them, so it's pretty odd. And a lot of rupees, if they're flying through the air, appear UNDER Link, even though it looks like they'd be going OVER Link instead of behind him.

Did I just get too used to the Gameboy Zelda games? Is this normal for Alttp? Did I simply forget about all these things since the last time I played? My laziness will be ruined if these questions are not answered. Please help, EoFF!