I recommend contacting Melio Customer Support, Tiffiny Taylor Krugh.

One of their representatives will guide you in tracking your payments made with Melio. You can get in touch with them by clicking this link and scroll down to the Contact section to get their full information.

Additionally, I've included an article about payment schedules in Online Bill Pay in QuickBooks Online. This will guide you with the correct timing in paying your bills: Schedule Payments in Online Bill Pay.

Feel free to inform us here in the Community if you need help with your vendor transactions. We're always delighted to assist.