Ah yes. I think there is a way to fix the teleporter stuff.
You see, in the original Cave Story, there are actually 2 types of Quote.
1. The player himself.
2. An NPC that looks exactly like the player (NPC number 150). This NPC is used for animations.
So basically, I just changed the first one. Changing the second one using NPC hacking should make the teleporter thing work.
Let me think about it for a moment and I'll get back to you.