Why Doesn't My Leaderboard Work?

Are the MP leaderboards broken?? Does anyone else have this issue? Am I the sole weirdo in this department?

I've had the game since launch, & dunno what the deal is.

I click on them, and no matter how I filter it [global/friends/apex/challenge] the only name that appears is mine. I have friends that play, so at least their names should pop up.