So I've finished this section of the game, and decided to go back and upgrade the castle to an "Official" Castle (Like requested in the Cerulean Steppe), but I'm having trouble getting the room to register.

I've done all the basic troubleshooting (Making sure they're the right rooms inside the town borders and on the same level, giving them a connecting door, hell I even made that door the Only door to see if that made a difference), but no dice. So I'm just checking to see if this is a limitation of Moonbrooke (Has Anyone gotten a "Castle" to register there?), or if I just need to tear that whole section apart and try from scratch again. ;?