Jumping forward in the Swedish path

I'm doing my weekly Swedish stuff (my daily being German).

Sometimes when I finish a lesson, I get randomly pushed forward a couple of step-stones or, as right now, half a unit. Has anyone been experiencing this, in Swedish or other courses?

I checked, and the course length is the same (55 units).

For context, I'm acing the content (Swedish grammar is, say, scarce when compared to German). Is that a new thing that if you do well, it pushes you forward?

TYIA