I checked your account and I can see that only one payment was from the milestone created on your contract. The other payments were sent to you as bonus payments. I would suggest to reach out to your client about this and discuss it further.
When you`re hired on a fixed price contract always make sure that the agreed budget is fully funded. Please keep in mind that our FIxed Price protection does not cover promised funds and unfunded milestones. To learn more how you`re protected under our Fixed Price Protection check out this Help Article. Thank you.