Vortex Wars

I recently leveled up after buying the 4th upgrade, which means I should only have around 350 shards right now as I've only played 2 games since then. Yet, I have over 500.

*Just realized I misclicked, could a forum mod move this to bug reports?

Same. Only I don't think I'm getting enough. When I win games, I get like only 20 shards for the game; sometimes less. That can't be right can it? The games are XXL 6+ players.