These are what I learned when I tried to move NXT to jelurida wallet.
NXT wallet Account ID and Public key would be connected after at least one transaction(Sent NXT etc.).
So, do not put Public Key on Message when you withdraw from Bittrex or Poloniex at the first time.
(even though NXT wallet says 'for more security, we recommend to use public key on message')Always make a test transaction with a small amount.
Sent NXT back to Bittrex or Poloniex with Account ID and Public key.
transaction fee for Bitrrex is 2 NXT and for Poloniex is 1 NXT.