Each day I'm paid out its significantly lower than the expected payout based on unpaid and balance values.

I'm now getting 1/4 of what I should be with a 1850Khs rig. Anyone else experiencing this? I've checked my rig and it seems fine. Its only on ~2.x% rejection as reported by CGMiner. Although I'm seeing this substantial drop each day over the past week in BTC payout. ie: 0.034 > 0.027 > 0.021 > 0.019 > 0.016 > 0.011

Here is my payout page:
http://middlecoin2.s3-website-us-west-2.amazonaws.com/reports/1Giu4rWR1ZE5M8an7ceBBCYSXerSDomAeE.html

Edit: I'm now trying EU server with US as failover but as I said above, i'm not getting high rejection and infact what is reported on middlecoin seems right, but my payout is what is low...?