My membership expires on the 15th of October, If I buy a 12 month membership, will the 12 months be on xbox one or will I have to buy another 12 month ?
the subscription will be on your account, and will work on both systems.
So no need to buy another one for the xbox one.
See this link: http://news.xbox.com/2013/05/qa at "Will my current Xbox Live Gold membership work with Xbox One or will I have to buy a new one?"
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