Adding existing Xbox 360/One gamertag to original Xbox

Also, if it says the GT Doesn't exist, it could also be an existing Zune or Xbox original gamertag.

You not understanding. The gamertag is an original tag scheduled for release however once released there is already a duplicate tag on the 360 with spaces in between.

So 2 same gamertags cannot exist at once forcing the real original to be stuck in the release process.

The inactive spaced version of the tag is holding its place on the 360 and blocking the release of the actual original tag from the original xbox.

Does that make sense?

Um nickiesullivan13, Xbox 360 has no mandatory internet check-in. Neither does the Xbox One and the original Xbox existed at a time before that was feasible.

It sounds like you're attempting to create a new account instead of logging in with the existing one. On the Xbox 360, you want to use the option that says "Download profile". From there, you log in with the email and password, and you should be
good to go.

Here are the official steps for adding/removing profiles on the Xbox 360: https://support.xbox.com/en-US/my-account/manage-gamertag-and-profile/add-remove-profile-xbox-360

[quote user="NutritiveMocha4"]and that would be the name " Amount " its a OG gamertag and i looked it up and no1 has it.. far as i know there isnt anything dealing with the gamertag amount.[/quote]That name does in fact exist
as an Xbox 360 (not original Xbox) gamertag. http://live.xbox.com/en-AU/MyXbox/Profile?Gamertag=A mount

The spacing of the letters and the capitalization of the letters is irrelevant, as Xbox Live reads "A mount" the same as "AMOUNT"