I upgraded to the family pack and then added a family member. She changed her gamertag, but when she hit save the console said there was a problem with marketplace and try later. Then, when she tried later, even though it still had the system generated gamertag on the account, when she tried to change that tag again the system said it would cost 800 points because the tag had already been changed once.
When we went online to try to manage the account, the tag she changed it to is in our profile. But when we go back to the console, the same old system-generated tag is on the console. When she tries to login to that system generated tag, it says that it isn't a valid ID and we need to download the right profile. but there isn't anywhere to go to do that that we can see.
We've turned off the console, logged off and logged on, etc. and the same system generated tag still shows up and it won't let her in.