I missed #5, I'm not sure I've noticed that, now I wanna go check if my game has that. Is it fixed in any later versions or anything?
And #6 confused me for a moment, what "dungeon songs"? You could've said the songs you play or something, I was thinking soundtrack for a while.
Btw, about #4, (I didn't read the whole thread, if anyone's mentioned it yet) the pillars on Termina field, the ones at the entrance to Ikana Canyon, they have a similar design to the blocks. They also have the Triforce on them.
Everything is correct, except you've forgotten one mask that you need.
Actually, you don't need the captains hat. You can keep shooting at them until you get it. Or you can be like me and have played the game so many times you have it memorized.