But mined coins of amsterdam server, looks like different from mined coins of other us servers... sincerely I am a bit confused...
I hope h2o will come here to the forum, or on his twitter account, to explain us better his progresses in fixing server stability
Yes, this was known for a while. Instead of just waiting for h2o to do something that solves your lack of profitability, simply decide to mine on several servers at once. That way your risk and reward is shared across various servers, and if one falls the rest still provide work.
Or even better, do as I did, start monitoring which server works better and has better payouts and use that. You get to pick the most average or most profitable scenario, with h20 doing nothing to assist in that.