Amazon Associates unpaid balance but transaction showing in payment history?

I've been waiting for my first payment from Amazon, and I'm confused because I just noticed there is a transaction in the payment history (say, for $100). However, the unpaid balance at the top right reads $100 as well, and I see no transfer in my bank statements. I've checked and I have all the appropriate tax docs uploaded, etc. Any idea what's happening? The payment transaction in the history is a June 1st payment for the month of April, which lines up with their payment schedule.

What mode you selected to withdraw? You will receive mail when they initiate the transfer.