Probably the card you used have a malus

Make sure you aren't using point penalty cards such as Gil.
Also if you verse another 16 star hand it's unlikely you will get a lot of points.

Did you level up as a result of that fight? Because that would do it.

The point scoring rules have changed from then I think

"A win with fewer stars in your deck than your opponent’s: +1 point per star. Max 5 pts." They put a maximum on the ammount of points you can win with * differences.

Infiniti is right. You no longer get points based when lower *s beat higher *s. It's now all about how many rounds are played in that battle, total * count (of your hand [or maybe it was deck {up to 5 pts?}]), if you win/lose/draw, and penalties.

Sorry Selina.

Lets say that you are 990/1000 points until your next level up. You then win your next match, in which you'd usually get 30 points give or take. Instead it only gives you 10 battle points you need to level up, and starts your new level with an empty bar. It's happened to me mid-tourney a couple times, and is annoying when up there with the leaders.

Winning three of the four rounds, assuming no penalty cards, should get more than 30 points at least. How much higher depends on the exact circumstances, of course. Never should it give 24 points, even in the new scoring system. Not in my experience, anyway.