Why the hashrate on the website is different from the hashrate in Miner status?

[lorrentclay]

I'm having problems with Ant miner S9.
in miner on the minerstatus tag announces hashrate is 13.5TH but on the Dasboard pool only 10TH or 11TH announcement (there are some 14TH). (VIABTC or BTC.COM is same).
I have about 100, whether I exploit ViaBTc or BTC.com also have this case.
I want to know why that happens, and how to fix it. Or is this normal? Please explain it to me.

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[Geraldo]

Local and pool report will be different, it because not every hash sending by our Miner accepted by the pool, what shown on the pool is only "accepted shares" that produce by our devices over time.

But, if there's too much gap between local & pool report, there's must be something going wrong, mostly caused by network delay (check your connection).