Unlink Old, Inactive account

Hello, I have the same issue as in this thread:

https://forums.xfinity.com/t5/My-Account-Sign-In-Xfinity-Website/How-do-I-unlink-an-account/td-p/3207688

Since 2 accounts are linked when I try to log into xfinity stream on my mobile device, for some reason it connects to the inactive account rather than the one with active services.  Not sure why it would do that but nevertheless....

Can someone point me into the direction to getting this fixed?  I've spoken with 3 agent and none of them knew how to fix it.  They tried changing infomation on the inactive one, which ultimately results in the same changes on the active one.  Need completely disassociated the inactive account from my details.  

On a side note, not sure why they wouldn't just automatically delete these inactive accounts after a certain amount of time OR make the mobile apps smarter to pick the correct account or allow you select the correct account.  But I digress.  Please help.