I see that many people here don't understand the miners table on Zpool and HashRefinery.
Under the miners table you see a "live" hashrate calculation based on your recent shares. That number WILL FLUCTUATE! It's normal.
You'll see a wild fluctuation depending on algorithm, ranging from 20% to 60%.
I'm constantly mining on these pools using profit switching with my in-house developed software. Nist5 and Neoscrypt are frequent algos we mine and I don't see any problem on the poolside.
Our scrypt miners report 200-800MH/s but they always average 550MH/s (slight overclocked, matches hashrate on miner side)
So it is normal, check the hashrate graph, not the live report, and if you mine for short periods It's like flipping a coin.
HashRafinery has stolen from me and 1000 other miners thousands of dollars. I compare real hash rate from mining software that for the same computer is similar with the values from hashrefinery website that is 1000 times less, almost zero for hundreds of gpu. I know they are stealing from all of us. Values must be the same, like it happens with other mining pools.
To make that steal possible, the administrators of HashRefinery reported 40% more income from their api to make programs like AwesomeMiner automatically use their pool by using unreal reports.
Do you agree ? We should let everybody know how much HashRefinery has stolen from us. Also all should contact hashrefinery user from this forum and ask for the stolen money.