SGD Rules Question

[clig76]

So in the solo dungeon the rules state that the main challenge should be at least 80 (or so) pts. The rules also state that each enocunter should be at least 1/3 of your party (500pt party = 166pth encounters). Does that mean if you have a main challenge that is less than 166pts you just draw more monsters until you reach 166pts?

I assumed this was the case. Just curious.