First of all, I am completely new to Xbox community. I purchased it in a last week and still has small knowledge about it, so please be understanding.
I've been playing with my brother on my Xbox 360 E console for a couple of days. We were playing spit-screen on our offline accounts. Then, today, I decided to click "Join Xbox Live" for some reasons. Everything went smooth and now I have an online account. My brother did nothing with his account.
After that we wanted to continue our campaign in Aliens: Colonial Marines. We logged (myself with a new Xbox live account, and my brother with his old offline account) in, and realized that there is no option "continue campaign"! We can only start a new campaign from scratch. Moreover, my brother of course has all of his equipment and I lost mine. But, what is worth mentioning, all my Xbox achievements survived. So, my new online account, has some remains from my old offline account, but the most important part: saved games seem to be missing in action.
Has anybody encountered such problem? Is it possible that all my saved games are lost? Where does Xbox keep them? Is there anything I can do to try to bring them back? I would be very grateful for any help.