Just gave my level another quick runthrough, and the parenthesis issue is fixed, so it says "(not" instead of "9not", so that's good. However, I decided to double-check all of my secrets, and... there are problems.
If you smuggle Yoshi into the IHOP mushroom platform area (where the Star Fox - Corneria music is playing), and take the pipe exit out of that room while on Yoshi, then you're supposed to be taken to a room that states "UNAUTHORIZED YOSHI DETECTED" and then tells the player that I can't have them breaking my whole level. From there, you'd need to leave Yoshi behind in order to continue with the level.
However, in this hack now, if I try that, I get taken straight to the final moon room, which is supposed to be a reward for avoiding all loose coins in the level prior to the goal screen. Additionally, if I do the coinless run proper, then the pipe that's supposed to take me to the final moon room instead takes me to the "UNAUTHORIZED YOSHI DETECTED" room. I'm guessing someone accidentally swapped those exit pointers somehow.
Also, upon entering the final moon room, the wrong message gets displayed. So, the "Display Level Message 1" sprites around there must not be triggering properly. Looking at Lunar Magic, I have a guess as to what the problem might be. In my original level, the game takes the 9 "Display Level Message 1" sprites way below the entrance to the final moon room into account for which message to display, despite them being far below where the room is entered. However, I'm guessing that doesn't happen in this hack, and so the wrong message is shown.
I tried copying the 9 "Display Level Message 1" sprites from below and pasting them right next to the final moon room's entrance, and tested it out, and now the correct message is shown there.
I also decided to fix up the exit pointers so that they all go to the correct places (didn't need to actually adjust the secondary exits at all while doing this). And, I've saved both involved sublevels as .mwl files so you guys can just insert them easily and everything should work correctly:
Your huge image stretches the page on me. Can you scale that down to like 50% of its size, please?