I don't think there is a problem with the refunding.   That seems fair.

The weekly game is a different issue.  20 BTC is a good step, but the damage was more like 62 BTC.   Someone refunded 6.5 BTC of the overpayment so that game is still short 35.5 BTC.   That is a lot of BTC and accounts for probably 70 - 100 in queued payments.   I don't think it is fair for those people.  (I'm not one of them)  

Last week the 2nd day was huge for the weekly game, so maybe those people will be okay.  It just doesn't seem fair.