Hi there I am the owner of BTCPOOL.EXCHANGE, no we arent staking them , for some reason the larger withdrawals have a problem we are investigating it atm and will update as soon as we have resolved it !!
Thanks for verifying that, I am patiently waiting my small deposit to clear admin approval as well, hope to see it fixed soon.
Ok with the deposit go into the deposit area were you get your deposit address there is a button to check deposit and click that , that usually unsticks deposits
Deposits dont require admin approval !!