I'm not going to trust Trex due to them shutting down US and the fact I think the market will become rational soon and it will go Gox when USDT goes boom.
I *think* you are confusing Bittrex and Bitfinex?
I think you are correct!

AFA Bittrex, I saw quite a few issues with withdrawals when checking them out so never rechecked. Has that been addressed or am I misremebering that as well?