Paid balance on account but still showing amount due

Chatted with John and MIchael of Xfinity yesterday.

Last bill July 13th was $68.44, then changed plan two times, once on 7/18, then again on 7/21, ended up with the $30 plan, total bill to be ~$45 per month.

So John told me yesterday that due to the prorating of the new plan, my actual balance due in my account was $46.41, even though my online account was still showing $68.44 to be paid by autopay credit card 8/8.  John also put in the $25 credit I was promised on a 7/18 chat with Xfinity.  So he said after the credit, my account was now showing $21.41 due ($46.41 - $25 = $21.41).  He said I could change my payment amount to $21.41 and then my balance would be zero.

So today I logged into my Xfinity account and paid $21.41 by credit card, but the account is still showing an amount due of $22.03, not zero, to be paid by credit card autopay 8/8.

Can someone please tell me if my account balance is actually now zero and my credit card will NOT be charged another $22.03 on 8/8?