Calculation Mistake = So what about all the low level radioactive Water ?

[whoosh]

So now the Japanese have told us they made a mistake in calculating the actual amount of radioactivity being spewed out into the enviroment .
So when they dumped all that , low level radioactive water into the, Pacific are they sure it was low level ?
If they can make a mistake once I am sure they can manage it twice or more .
All that radioactive water and they have only found one radioactive fish = easy to miss I guess .