I am disappointed with Deep Dungeon

[Kaurie]

how much data do you have for this? sounds like confirmation bias.

It is true. You can tell by watching the yellow/white text next to your weapon as you level.

i.e. if your weapon is say level 21 and you are 43, it will be yellow. You gain a level and are 44, then now it's white - on the same floor. This DOESN'T mean you can level it at the floor though, it just means you can level the weapon on the appropriate floor.