When you use the login feature you are not removing your storm ID from your old device.
Since you new device now has a storm ID, you will not be able to transfer your storm ID off your old device.
You will need to send an email to
support@teamlava.com. Tell them that you have moved your games over to your new device by using the login feature but you do not want your storm ID to remain on your old device ( so no one else can have access to your games) and ask if they will remove that storm ID from that device.
Future reference:
To permanently transfer a storm ID off a device use a storm 8 game.
See post 1
Transfer Thread