I am also confused, what happened to bittrex, until now my funds can not be taken, it's been a month more. make a headache, already complain with email but its zero
I think they're in trouble. It's not just that they are closing down random accounts and have set legacy accounts to new. Or that their verification is broken to ensure people can't withdraw.
It's that their withdrawal fees are among the highest of all the exchanges - which means they are desperately trying to stop bitcoin from leaving their site.
If you are still able to withdraw, I would do so - perhaps convert to an alt to get around the withdrawal fees. I think the writing is on the wall for them, they are following the same pattern as Cryptsy.