I am having a lot of issues with Poloniex lately. Until one month ago everything was more or less ok, maybe just a bit of delay. Lately I have 5 open issues never solved (being processed); the oldest from the beginning of July and they did not provide any explanation. One of the most serious regards the transferring of all my Myriadcoin that according to them is completed with a Txid... and now became again "pending". Hopefully, it is just a matter of time...but this time it took really a lot!