- XxGenesis1xX
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- Exalted Heroic Member
Well in theory, the achievements should register once you complete them regardless if they are online or offline. If what you say is true, that you signed into your account at your friends, then this would be a pretty strange glitch/error.
I think you might have signed in as a guest/vistor profile on your friends xbox by mistake. And when you guys unlocked the achievements it was only for your friends profile.
However, if you are 100% sure that you were logged into your account that you either brought over to his house or recovered via Xbox Live then I really don't know what to tell you.
You might have to do the achievements over again and hope the first one you unlock will unlock all the other ones you have completed.
[Edited on 08.02.2010 8:50 AM PDT]