They started the day with way more unexchanged than you it looks like (something like 0.09). So it looks like the gain for today is similar, no?
Correct, they started the day with a high unexchanged balance, but if you look at the personal charts, we each have the same hashrate over the past few days, why was their unexchangex so much more than mine? Or anyone else in that hashrate range? Before I knew that each server was doing something different, but h2o stated that all servers are doing the same thing now. (Even before US server was more profitable and I was and always have been on US server). Also, their unexchanged is much higher, but so have their daily payouts.
I am not sure why their unexchanged will grow differently (with the assumption that all server mine and trade exactly the same). I know that, sometimes, some trades randomly get stuck in the exchanges (i.e. Crypsty from my personal experience) and they need manual intervention (i.e. cancel and resubmit). Maybe it is something like that.
As for the perfs of the past few days, I have noted several days when you had larger payouts, eg. Jan 6th or a few days before. (although, to be fair, it looks like their hashrate decreased a bit compared to yours). It would require careful examination for each day to be sure, and I do not have much time right now ...
but it seems to me that, at least for your example of the last day, your total gains increased very similarly to theirs, contrary to what it may have looked like at first glance.
Cheers.