No idea how and not getting help from support
To another android - signing in to game cener wont work because it only sees my id for my other android account
Just configuring with my google play account seems to be sufficient. My alt account exists on one of my mobiles as well as my kindle without issue. I just upgraded the associated phone a month ago and everything was seamless when i reinstalled the apps.
That does not help - it automatically brings in the wrong account - the one on my other android device
You are using the wrong access user email address. Sign out and use the correct one. You cannot have two google play accounts attached to a single email.