I'm not convinced that there isn't a problem either. I love the concept of zpool but every time I've tested it I get really disappointed.

I tested it yesterday for 12 hours, pointed 2 rigs to it. The estimated earnings should have been close to $25-30 total for those 12 hours. I stopped last night and waited until today to confirm (once all earnings cleared as last night some were still immature or on the exchange) and my unpaid balance today is only worth around $12, so less than half of what estimates were.

Pool was seeing my correct hashrates each time I checked yesterday, the coins it was mining were in the range for the payout I expected and as far as I know none of those coins tanked before being exchanged.