Two factor authentication - wrong phone number after plan change and device upgrade

[zitsky]

There are two of us on the account, me the account owner and my spouse an account manager.  Since changing my plan and upgrading to a new device, when I log in using a browser on my Windows laptop, it wants me to use 2FA with my spouse's phone number, not my own.  When logging in from my new device, I have no problems. 

I saw a post suggesting that might happen for a week?  I was chatting with a rep today who wanted to "unregister" both our accounts, whatever that is.  I work in tech so I'm not a dummy, but I think your rep was not going in the right direction.  Can someone explain how to fix this?

[vzw_customer_support]

We always want to ensure the security of our customers accounts. You have the option to disable two-factor authentication in the security settings when logged into your account. We will send you a private message to gather some addtional information to assist you further. 

-Toni