So when the bitcoin halving occurred it seemed logical to me that my payout to the miners would have decreased by 50%.

However my payments decreased by roughly 3.5 times

The payout before the halving was 0.00111840, so I was expecting my new payouts to be about 0.00055920.

However I got paid 0.00032694 yesturday and 0.00032072 today.

It seems to me that genesis-mining is using the halving as an excuse to scrap off additional coins that should be paid out.