Regarding StevenD's payout.
You didn't mine very much at all.
The diff since you started mining (10-November) have been:
Block: 389088 Diff: 93448670796.324 Since: 2015-12-18 20:09:07.197 UTC PPS: 0.02675 satoshi per 1 diff share
Block: 387072 Diff: 79102380900.226 Since: 2015-12-06 23:30:40.718 UTC PPS: 0.03160 satoshi per 1 diff share
Block: 385056 Diff: 72722780642.547 Since: 2015-11-24 02:34:53.816 UTC PPS: 0.03438 satoshi per 1 diff share
Block: 383040 Diff: 65848255179.703 Since: 2015-11-11 10:12:04.127 UTC PPS: 0.03797 satoshi per 1 diff share
Block: 381024 Diff: 62253982449.761 Since: 2015-10-29 04:25:51.207 UTC PPS: 0.04016 satoshi per 1 diff share
For the range around 24-Dec you mined from part way into shift Dec-23 14:26:35, to part way into shift Dec-24 09:06:25
So that was actually less than a day worth of mining.
To be exact, it was from 2015-12-23 14:44:12 to 2015-12-24 09:16:55 = 18hrs 32min 43s
(but you submitted 12 shares before that while disconnecting and reconnecting workers)
Your S3 averaged around 436.29 GHs for that time
The total difficulty you submitted was 6,847,686
At 436GHs that would be expected to take 67455s = 18hrs 44min 16s ... so that's pretty close
Anyway, 6,847,686 * PPS = 6,847,686 * 0.02675 / 10^8 = 0.00183176 BTC <- 100% PPS value for those shares
--
The actual db storage of all your shares (just showing valid difficulty you submitted and the bitcoin difficulty range) is:
diffacc | bits
----------+----------
8277724 | 180bc409
0 | 180f1e76
13514246 | 1810b289
1091829 | 1811a954
i.e. 100% PPS for all your shares submitted is:
8277724 * 0.02675 + 13514246 * 0.03797 + 1091829 * 0.04016 = 0.00778413 BTC
Your total rewards: 0.00732936 = 0.00732936 / 0.00778413 PPS = 94.2% PPS
--
The blocks after the last time you mined (18.5hrs) have been 121.169%, 190.836%, 193.605%, 8.930% with a mean of 128.638% or luck of 77.74% ...
--
So basically, your mining stints have been very short and thus would expect to be subject to high variance, your last mining stint was before the last 4 blocks with a luck of only 77.74% so far, and yet you still have 94.2% PPS on all your shares so far ...
I'm not seeing anything like you suggest ... ...
--
Edit: also I'm not sure why you keep showing the fact that you don't mine for 5Nd and then say you should get 5Nd?
If you mine for 18.5 hours out of 4 days then your average hash rate will of course be MUCH lower than your miner says.
Simple math 426 * 18.5/96 = 82GHs
Look at the shifts page ... that shows you getting around 436.29 GHs for the last lot of shifts except the first and last shift that you didn't mine the whole shift.