No need to say sorry!  We appreciate your efforts making sure you're billed right. Its true that you've made a payment today total if $369.19 which help you lower the bill balance. 

However,  this payment was actually used to pay your bill last August. 

The payment you've made last June for almost the exact same amount had bounced back since the bank account used for the payment is already closed.  That's a total of $330.40 returned payment plus the $88.26 back out payment due to insufficient funds.

That's why it still shows as a past due since your payment was used to settle those returned payment which could have made your account current. Does this make sense so far?