I have revoked delegated STX but they remain locked, why?
Once the tokens have been locked by the proof of transfer protocol they will always remain locked for the committed period of time. When you first stacked your STX you will have chosen a number of cycles to Stack for and if you chose to indefinitely Stack. This means that the tokens have been stacked for that many cycles (for example 3) then there is a cooldown cycle and the pool operator will stack the delegated STX again for the next commitment period (i.e. 3 cycles). Once you have send the "revoke" transaction. The pool operator will no longer be able to lock the STX in your account again. You will however have to wait for the remainder of the commitment period to pass.