So i bought the key from noran, entered the hidden bookshelf entrance and finished to the very end and got the achievement. I decided to look at my inventory and noran’s key is still there along with the oil that i got so i decided to combine them so it became the oiled version. I thought i must’ve missed another chest at the very end so i decided to come back but the oiled version of the key won’t let me in on the bookshelf anymore. So is this intentional? Do i have to wait another day for reset just to buy the normal key again?