First payout represent december(carried with nov) earning with 0% fee so 29.99
2nd payout is january earning with 12% fee so 26.39
Earning Balance is usually buggy but it represent previous month earning if it didnt reach 100$.
So for now it only storing March earnings which is 29.99 with 12% = 26.39
When end of May will be reached, it will add April earning with the stored earning balance and should give around 26.39 + 35.1(including 12% fee)
Note: payment are made/calculated on the next month.