Deepbit pays out 48.5BTC per round. ( 341 / 1487205 ) * 48.5 = .01112052 BTC
I can't explain where the missing BTC would be, but as far as shares, guiminer doesn't and can't keep track of pool rounds. You would have to know the exact start and end time of a round (the time between pool block solves), set your computer clock to match the pool's computer clock, and have logged your accepted shares to a log file (using a command-line miner, like phoenix) to verify for yourself how many shares you submitted during a particular round.
The amount you should make mining per day: http://forum.bitcoin.org/index.php?topic=21541.msg272356#msg272356
If you are mining 24/7, your rewards should be very close to the above formula. If you mine for a few days in a pool and don't seem to be getting what your ghash/s says, try http://www.bitcoins.lc
, where after mining for a few hours, you will see exactly how much you are estimated to make a day in your stats (and they don't take 3% of your earnings or charge you to withdraw).