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Poloniex has major human (and maybe other) resource issues - they lack them. That is the price of having a centralized company which can grow faster then what the owners can handle... happens every day - not just by Poloniex or on the money/crypto market... And that is one reason why I really started to believe in decentralized companies and/or decentralized Exchanges (like Bitshares DEX, etc.)

Yeah I've just been lazy to be honest and stayed with Poloniex but I'll be moving away from them as soon as I can get my STEEM outta there!
I should have got out long ago when the lag issues were constantly losing me money on trades but as I said, I've just been lazy really.

Don't blame yourself on this anymore... Do something, any little thing what you can do on this right NOW. After that decide something: for example, I'll do this and that if I see that they do not reply for my e-mail, or the system lags at this point so and so... etc. These points, what you already decided earlier that the actual issue emerges should simplify your decision - and so the decision will be easier and quicker. Just an advice ;-)

Good on you mate