I think you cheat, yes!
Did you do it again? why you use Week CDT instead of Month CDT for slush? Week CDT has latest difficulty... uhmmm
Name Payout Hash Rate Network % Users Block (d:h:m) Week CDT Month CDT Quarter CDT Year CDT Web
KanoPool PPLNS 49.16PH/s 0.19% of 25.27EH/s 1,439 509209 (7:17:11) 0.00000000 0.00002591 0.00014308 0.00035475 kano.is
SlushPool Hybrid PPS 2.39EH/s 9.47% of 25.27EH/s 18,452 510427 (02:04) 0.00008985 0.00009807 0.00015120 0.00033502 slushpool.com
month CDT slush vs kano -> 0.00009807 vs 0.00002591
Not eighter a real photo of what has happent in January/February, but, at my oppinion closer than your maths...
I noticed this morning that my CDT was off for the last block. I tried to auto-fill the Kano effective hash rate with the number of shares submitted and obviously botched it up. I am 99% sure it is right once anyone uploads their Kano rewards page because that directly has all the data that is needed to compute the CDT. I uploaded mine a few minutes ago so should be right soon. This will eventually all get worked out, just a huge amount of math to keep track of.