It's fine. Read this, here, from our "Download & How To" page:
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The block height goes up one block every two minutes under normal conditions. But the block emission rate will speed up (less than two minutes between blocks) for a little while when the hash rate is rising. And it will slow down (more than two minutes between blocks) for a little while when the hash rate is falling. This is true of most CryptoNote coins.
1h for a block
https://s15.postimg.org/3wi5e0mi3/Screenshot_9_11_2016_7_27_43_POOL.png
There is no problem with the blockchain or the pools.
Someone mined with Great hash rate, over 40K and this made the difficulty to raise also the network hash.
Unfortunately he cut the hash rate so now the blockchain must adjust the difficulty.
this means that in few hours we will be in the normal situation.
let me get straight....you telling me that if YOU rent a hashpower from nicehash and the (block) did that to you,what will YOU SAY TO YOUR SELF