If you ask me, it's just insider trading from Poloniex. It's very unusual for an exchange to be that incompetent in circumstances that aren't suspicious. Their trollbox was full of complaints about shit like this and the fact that they took a very long time to respond to support tickets, so they just removed it altogether.
There was a thread on here from someone who had 400 BTC stuck on Poloniex for several weeks.
As soon as you can, move over to Bittrex (or ideally, a decentralised exchange). They've always been good for me.
Well that's sad, I was very excited about polo, the volume is incredible, liquidity very good, interface good enough. I still have some assets there. I was trading in bittrex and I had no problems there. Although, I experienced a glitch: that pop-up when your order gets filled, when I had partial executions it came up time and again for the same partial execution, until all of it was executed.
Both of them kinda delayed my deposits/withdraws a bit, but nothing that serious -- only a bit frightening. I still didn't try to withdraw in polo.
Which decentralized exchanges are out there? I thought they still didn't exist as of now.