I did some mining on grcpool, since I had been doing seti@home and similar stuff anyway.
Upon payout from grcpool, I found that my wallet was not updated at all.
And after much research, I am confident about what I did was probably correct and through the process, I understand the whole mechanism more.
Then after around two days of time, I found my wallet was updated.
Just to keep this note to everyone, and please be reminded that it could take one or two days, or even a bit longer.
Keywords: grcpool, wallet not updated, payout not received, wallet failed to update, grc, grc mining