Looking through the logs I can see one miner submitting mostly rejects - all below target level, suggesting dodgy firmware on his hardware, but I don't see anything else untoward. That might be enough on its own. I suggest each individual user check their own stats and see if their hashrate at the pool reflects their hardware - ckpool reports hashrate based ONLY on accepted shares.
Reviewing one of my miners, he has been mining in CKPool for 18 days and yields the following data:
Diff Priorit Accepted DiffA DiffR Rejected Stale LSDiff LSTime
105K 0 458879 38400602087 19012175 227 22 104698 0:00:00
Would it be possible to get a screenshot of what my miner is doing?
I try to look for information in Spanish about what the miner actually does, what data it takes into account, the Hashes it sends but I can't find any information about this.