What do you think about the releation between increasing difficulty and low profit market days? Has it been like this for a week in the past ?

Hello all, I am not an expert here. Just wanted to make the stats clear. Here is my cgminer picture running for 12 hours.The reject rate is constanly around 3%, check please the other stats. The WU is around 2700. I have read the forum thread and seems that the pools pays for the work utility not for the hashrate. Well it is a product of the hashrate anyway. The site statistics shows 3mh/s or 2.6 or 2.8 but it never maches the ratio between the hasrate and WU ~ 90%. If it is correct that we get paid for the WU, is there way to make it higher based on the cgminer picture below? and is the site stats that correct ot it varies and is just illustrative? Thanks a lot, any reply is appreciated.




 cgminer version 2.11.4 - Started: [2014-03-02 20:54:50]
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 (5s):2.936M (avg):2.950Mh/s | A:3857  R:121  HW:0  U:5.0/m  WU:2669.6/m
 ST: 2  SS: 6  NB: 3183  LW: 39393  GF: 1  RF: 0
 Connected to us.clevermining.com diff 512 with stratum as user 1NFHrYMkz9Z1ziAt
 Block: c37c01cd760cdf7c...  Diff:14.1M  Started: [09:38:24]  Best share: 1.16M
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 [P]ool management [G]PU management ettings [D]isplay options [Q]uit
 GPU 0:  72.0C 2599RPM | 745.8K/744.7Kh/s | A: 994 R:20 HW:0 U:1.30/m I:13
 GPU 1:  76.0C 2670RPM | 742.8K/743.1Kh/s | A:1017 R:39 HW:0 U:1.33/m I:13
 GPU 2:  67.0C 2290RPM | 730.7K/730.1Kh/s | A: 931 R:31 HW:0 U:1.22/m I:13
 GPU 3:  61.0C 2410RPM | 731.7K/730.3Kh/s | A: 915 R:31 HW:0 U:1.20/m I:13
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 [2014-03-03 09:30:35] Stratum from pool 0 detected new block
 [2014-03-03 09:30:37] Accepted 01c3aa9a Diff 910/512 GPU 2
 [2014-03-03 09:30:45] Accepted ab9485d0 Diff 5.62K/512 GPU 3
 [2014-03-03 09:31:19] Accepted 8371efd9 Diff 732/512 GPU 3
 [2014-03-03 09:32:00] Accepted eaf5588b Diff 874/512 GPU 3
 [2014-03-03 09:32:02] Accepted 1dac49ec Diff 589/512 GPU 2
 [2014-03-03 09:32:12] Accepted 212bc284 Diff 769/512 GPU 2