Netflix App on my X1 defaults to another user.

I have X1 service and my own netflix account. I watch Netflix using my own account through the X1 Netflix Apps.  Last week when I had a whole system refresh, when I go to Netflix Apps it automatically login with another user account (I don't know who she is but I can see her netflix registered email address and profiles).  I acn watch netflix with her account but I want to use my own account.  Comcast tried resetting the box, I reloaded the app and as soon as it comes up, it uses her account.  I can force logout the account from the X1 DVR box (Arris AX103ANM) and login with my netflix account.  But as soon as I logout, it switches to her account.  Second problem is from the small companion tv boxes I use in other TVs, I cannot login to Netflix with my account.  It piggybacks to the main DVR box and it thinks her account is the main account.

I called Netflix and they said comcast need to deregister that box from her name.  Comcast confirmed she is a comcast subscriber.  But they don't know how to deregister the box.

Anybody have any idea?  Short of replacing the box and reprogramming all my DVR schedules 😞

Any help would be great.  Thanks.