When the Type Limit of a decoration has been reached, the decorations that offer greater bonuses will be given priority. Example: A decoration has a Type Limit of 2. A Lv. 5 decoration grants 100 bonuses, while a Lv. 4 decoration grants 80 bonuses. If you place two Lv. 5 decorations and one Lv. 4 decoration, the total stat bonuses would be 200.