My point is, it might be that the 0.04 marking on the graph IS in fact 0.035, but rounded to 0.04, which would then be a display error. If you notice, the graph has TWO markings for 0.03, and TWO markings for 0.02: there is something wrong with how the graph displays it's markings.
Further more, you can see that there is a marking for 0.01, and just below, a marking for 0.005. So, if each line means 0.005, then the 0.04 line we speak of is indeed, in fact, 0.005
Yes I think you are right. Thank you for pointing that out.
You can just look at the raw data also:
http://eligius.st/~wizkid057/newstats/userstats.php/1N7wXVJTtPBuW2HRTxrQpBbdXCZ3wmS17c?cmd=balancegraph&start=0&back=604800&res=1date,everpaid,unpaid+everpaid+est,maximum reward,unpaid+everpaid
*snip*
2014-03-26 00:33:44,0,0.03485586,0.03982169,0.0350156
2014-03-26 00:33:45,0,0.0349856,0.03982169,0.03485586
2014-03-26 00:45:00,0,0.03486881,0.03982169,0.0349856
2014-03-26 00:56:15,0,0.03553791,0.03982169,0.0349856
2014-03-26 01:07:30,0,0.03543366,0.03982169,0.0349856
2014-03-26 01:18:45,0,0.03529473,0.03982169,0.0349856
2014-03-26 01:30:00,0,0.03516289,0.03982169,0.03529473
2014-03-26 01:41:15,0,0.03575916,0.03982169,0.03529473
2014-03-26 01:52:30,0,0.03564516,0.03982169,0.03529473
2014-03-26 02:03:45,0,0.03557166,0.03982169,0.03529473
2014-03-26 02:15:00,0,0.03545091,0.03982169,0.03557166
2014-03-26 02:26:15,0,0.03612512,0.03982169,0.03557166
2014-03-26 02:37:30,0,0.03597662,0.03982169,0.03557166
2014-03-26 02:48:45,0,0.03587034,0.03982169,0.03557166
2014-03-26 04:18:44,0,0.03587034,0.03982169,0.03557166
2014-03-26 04:18:45,0,0.03540942,0.03982169,0.03557166
unpaid+everpaid increased, indicating paid shelved shares (since maximum reward isn't increasing when you're not mining). Also, keep in mind the share log on the reward side uses sub-satoshi precision.