Had 20 total. 5 on warlock, 5 in vault, 4 on hunter, 5 on titan and dropped 1 in post office. Switched to hunter rotated inventory with vault (hunter now has 5, vault has 4). Went to bed. Woke up next morning. Jumped on my titan to rotate the keys from the vault to my inventory. (so my titan would have 4 and the vault would have the 5 from my titan inventory, so i could grab the 20th key out of the post office). BUT! 5 keys in titan inventory and 1 from the post office were gone (14). p.s. I think it was a glitch that erased it from the daily reset. i wish i could figure this out so i could delete Spark of Light, Primary ammo sin, ect...