Has my ESA been cancelled?/

Hi, Can someone please help explain how my ESA fortnightly payment was received as expected on it's due day 27-12-2018 and another payment for one week was received 03-01-2019. I haven't received any letter to say there has been a change in my allowance and it would be surprising if there was as my conditions have remained unchanged for 30 years. (brain damage following deep bleed)
I am currently in the support group and was sent an ESA 50 with a letter dated 25-11-2018 saying it needed to be returned by 26-12-2018. As it came from the Health Assessment Advisory Service, who aren't too far away for my carer to call in person, I made sure they had the form, and my up to date medical evidence hand delivered to the issuing office and a receipt was given. I had a face to face for PIP on 02-01-2019.
The ESA one week payment without correspondence has me particularly worried. Any insight would be most welcome.
Many thanks.
MJ

Thanks Gordon, on reflection it makes most sense. ESA and PIP assessment together over xmas and new year have left me even more skitzy than usual.

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