Signed in, but it asks me to sign in with the profile used for purchase

set your console as home console to share everything in your account. You must sign in first with your account.

It would be advisable to review the Settings - Account - Sign-in, security & passkey section on both consoles for the profile being used to ensure that applicable settings are in place to prevent issues of that profile being used in multiple locations or
unauthorized purchases. Select Change my sign-in & security preferences and I recommend using Customize to set the specific type of access that you wish to allow/disallow, items to check/adjust for example are:

• Delay automatic sign-in
• Ask for my passkey at sign-in
• Ask for my passkey to change settings
• Ask for my passkey to make purchases (definitely recommended to use Passkey required to avoid unauthorized purchases)

Good luck!

I am aware of that IceStorm III i have already purchased the CAR as DLC and with in game credit i have even painted it etc, and i went to use it today only to be asked to purchase the car using real cash AGAIN. That my friend is the point i am making
this F2P DLC charging malarky is getting out of hand.

Make sure any other profiles that may be signed in are signed out. I couldn't play the Titanfall Beta when my partners profile was signed in, despite me being signed in as well. I had to sign her out in order to access my content.

Check Settings - Account - Sign in, security & passkey - Instant sign in (your GT should be displayed on this prompt) - Stop using Instant sign-in on your console OR try add a Passkey for sign-in first to see if that works for your needs.

You also have the option of linking a controller to your profile (This controller signs in) which you may want to ensure is set to using a Passkey that only you know.

I recommend that you review the Change my sign-in & security preferences section and ensure that the settings match how you want your console to be used. I recommend the Customize option which allows you to select each of the sub-categories individually.
For example:

Save your Microsoft account credentials - Credentials saved

Delay automatic sign-in - Don't ask, just sign me in (good if you only use one console, best to use Ask option if you use your profile on more than one console)

Ask for my passkey at sign-in - Passkey required (recommended if you link to controller that others may also use)

Ask for my passkey to change settings - Passkey required (best if you don't want others making changes)

Ask for my passkey to make purchases - Passkey required (best if others also use your console to limit purchases)

Good luck!

If you go into Sign-In & Security Preferences, set it to 'ask for my passkey' if you want it to always ask for your passkey before signing in or buying things. Although if you still want to be signed in automatically when Kinect sees you, use 'check that
it is me' and it will still ask you for the passkey when making purchases or if you sign in with a controller.

You're permitted to make one free change per gamertag after creation, so that could be the reason for that. Can you use those email addresses to sign into
https://account.live.com? From there you should be able to edit the profile name, which will be reflected on the console.