Pending Aid/Payment Plan

My current balance is around 7.6K with about 6.5K pending aid. I can pay the remaining 1.2K, but I did the installment plan, because I’m not sure when my pending aid will stop pending.

Is there anyway to tell or be sure my aid comes in before the August 18th deadline? My installment is asking for 1.9K for my first one, but my term total says out of pocket I should only need to pay 1.2K.

Just very confused on how paying is working out as a first year student.