Okay, see if I can explain this without any images.
So this is my Castle Layout atm:
Arena --- Fusion Place --- Chance Chest + Crystal Conversatory
Armorsmith ---- Tavern ---- Tavern ---- Armorsmith
Locked ----- Training Field ---- Tavern + Tavern
Locked ----- Tavern + Tavern ---- Tavern + Tavern
Other two rows not unlocked yet.
Because I have my Chance Chest on this current place, does it mean I just wasted one spot where I can put an Armorsmith/TF?