it's a bug?
example:
11/4/2017 2:33:09 PM: -------------------------------------------------------------------------------------------------------
11/4/2017 2:41:27 PM: BTC_ETH
11/4/2017 2:41:27 PM: We want to buy: 0.0035522447581892266573708368 ETH Available volume: 29.69187058 Price: 0.04222682
11/4/2017 2:41:27 PM: {"orderNumber":"365414703664","resultingTrades":[{"amount":"0.00355224","date":"2017-11-04 12:41:25","rate":"0.04222200","total":"0.00014998","tradeID":"35764006","type":"buy"}],"amountUnfilled":"0.00000000"}
11/4/2017 2:41:27 PM: We bought: 0.0035433462010354011431307418
11/4/2017 2:41:27 PM: ETH_ZRX
11/4/2017 2:41:27 PM: We want to buy: 5.6664526978753296602231526259 ZRX Available volume: 916.85244119 Price: 0.00062532
11/4/2017 2:41:27 PM: {"orderNumber":"5329766092","resultingTrades":[{"amount":"5.66645269","date":"2017-11-04 12:41:26","rate":"0.00062532","total":"0.00354334","tradeID":"115473","type":"buy"}],"amountUnfilled":"0.00000000"}
11/4/2017 2:41:27 PM: We bought: 5.6522655035859991421531954793
11/4/2017 2:41:27 PM: BTC_ZRX
11/4/2017 2:41:27 PM: {"orderNumber":"5865072249","resultingTrades":[]}
11/4/2017 2:41:27 PM: Sold 5.6522655035859991421531954793 ZRX For: 0.0001505955227937975432288398 BTC
11/4/2017 2:41:27 PM: PROFIT % : 0.6480 Bank used: False
11/4/2017 2:41:27 PM: CURRENT SETTINGS: [Price lines] 0 1 8 [Volume Multipliers] 2 4 2
11/4/2017 2:41:27 PM: Current ETH Bank Values: [Amount] 0 [Avrg.Price] 0
No its not a bug.Thats the raw response from Poloniex.That means that the order is not filled at the moment of receiving the response from Poloniex, and its with status Open Order.