http://cryptoknight.cc/ Network Hash Rate: 25.86 KH/sec, Pool Hash Rate: 873.34 KH/sec
https://pool.bitcoinote.org/#  Network Hash Rate: 38.94 KH/sec Pool Hash Rate: 96.95 KH/sec

Why? Is Network un stable?
Because at same time give different Network Hashrate.
Pool Hashrate also always Higher than Network Hasrate. Are you sure?
Please check 2 or 3 mining Pool.

This make Cryptonight Calculator Miss and Make Highest Earning on Cryptonight Mining!!! Also will make Estimate Earning on Pool Completely wrong and very Dangerous for Miner!

I have added Bitcoinote on https://cryptoisme.com