Originally Posted by ShiftySamurai
I am guessing you have 2 xbox profiles, one you use to play on XBL, and one you use to play offline.
You can't open a track made by another profile in the editor, and you can't share tracks made by others. So if you made a track under your offline profile, you won't be able to share it from your online profile.
You should be able to share from the offline profile by joining Xbox Live, and you don't even have to have a Gold membership. So, if you really want to share those tracks, that's what I would recommend.
If I read your problem wrong, please let me know.