Can two people use the same flatster account simultaneously?
No, only one user can use the account at any given time. If somebody else (or you, from a different system) logs into your account, the current (older) session will be automatically terminated. flatster cannot know which is the rightful user. In such cases, you may have to block your account and have flatster provide you with new access data. Also remember that, if you share your account, other people will be able to access information such as your playlists and music data. If they make any changes, you will have to live with the consequences.