Another problem is that under "Statistics > Pool" it will show your estimate ZEC/day and I never reached even half of that amount daily after weeks mining there. I'm out of suprnova, something shady is going on.
The guy who runs it as far as I can tell has a rather sterling reputation. The list of alternative pools with better reputations is pretty much non existent. Only a few as good
What cards are you usuing where running ZEC is profitable anyway?
I've used their SIGT, MONA, LBRY, ZEN, and CHC pools for well over 48 hours. All of them paid out within expected variance.
Reducing difficulty slightly from the auto difficulty helped even out the dashboard for me. Didn't seem to increase payout but it makes me feel better when I look at it