The bot should NOT have bought twice. If you observe something like this please send us the details (including log)!
It hapened again with the ping pong bot !
I think it occurs when the strategy is running and you manually cancel the current order.
The bot will think the order has been fulfilled and will place the opposite order, which results in a double buy or double sell.
IMPORTANT 04/15 09:40:35 am [poloniex:bot:ETH/BTC] : [DR. PonG] current order was manually canceled, switching to sell
CRITICAL 04/15 09:40:35 am [poloniex:bot:ETH/BTC] : [DR. PonG] transition to "switching state"
DEBUG 04/15 09:40:36 am [system] : heart is beating ...
CRITICAL 04/15 09:40:36 am [poloniex:bot:ETH/BTC] : [DR. PonG] transition to "creating order"
Please solve this, I lost some money because of this bug. (definitely not a feature !)