Well, in the first fortnight I paid home, car fee and Internet bill. In the second one, I paid loan, housekeeper and give money to my parents and son. Goodbudget only split the amount, but I need to show some payments in the first fortnight and other in the second one.
That's a good question! Goodbudget can help you budget with an 'Every two week' or a 'Semi-Monthly' budget period. You're right that, by default, when you fill your Envelopes, Goodbudget will fill your 'Monthly' Envelopes with about half of the budget.
When you're ready to fill your Envelopes with your first paycheck, I'd recommend filling to full your Monthly Envelopes that represent bills that need to be paid with your first paycheck. Then, when you're ready to fill with your second paycheck a few weeks later, you'll fill to full your Envelopes that need to be used with your second payment.