The refused transactions from dsh.democats.org are resent.
Result from running the script:  1374 confirmed      156 rejected
All rejected have been resent

I contacted extremepool's owner with info how to use the script.
If anyone have interest in the script, here it is:
https://github.com/pmitchev/cryptonote-pool-modules/

All of you can easily see the problem with Minergate just by a simple comparing:
http://chainradar.com/dsh/blocks?filter%5Bheight_greater%5D=78300&filter%5Bsize_greater%5D=11000
https://minergate.com/pool-stats/dsh/31591
I challenge you to find block mined by Minergate in the first link