Any hand you play on there against another player, their data is tracked and when you see them again it will load and show the data. I play on the same network (different site daily) and have tens of thousands of hands on opponents. Are you sure you already played against them, and your HUD is aligned correctly? The spartan poker is part of the BOL network, so there’s tutorials on here about it already.
As far as your HUD stats in tournaments, you can view your stats in the tournament tab. Your HUD by default resets to zero for you, because you already know how you play, and you can always click on DH to see your stats.