Question: Why are my scores not appearing on the Social Club Mission Leaderboards?
Answer: Users must make sure that the following conditions are satisfied in order to have scores saved and uploaded to the Social Club:
The 'Try Again' phone message was not used to start that mission after failing it.
A taxi was not used to 'trip skip' during that mission.
The console was connected to XBOX Live when the mission was completed.
Scores will not get saved when some form of 'trip skip' is used to complete a mission. So, if conditions #1 or #2 were not true then replay the mission while connected to XBOX LIVE. Players can replay missions using the new 'mission replay' feature that becomes available after completing the story.
If condition #3 was not true then, in addition to replaying the mission while connected to XBOX LIVE, users will also have to earn better scores in each of the stat categories for that mission; or start a new game and replay the story while online.