Heaven on High floor traps

Not sure if this is a bug or but just in a party on floor 28 and there was 2 floor traps side by side one was a floor bomb trap other was one that causes silence and pacify. Group was pretty sure in the small rooms and not open floor type only suppose to have 1 floor trap per a room. There was no silver chests in that room ether just a gold chest.

I've seen two traps in one room quite often. I think some floors and rooms are designed to surprise you. I've seen traps parked right next to treasure chest and key portals too. SE likes playing dirty hehe.