The three year BS is a Bachelor of Science Degree, correct? If this is so, and NOT a three year DIPLOMA, then I think it looks like 20 points. If you had TWO Bachelor Degrees it would be 22. It doesn't make much sense, but that is how they award the points.
Two or more university degrees at the Bachelor’s level AND at least 15 years of full-time or full-time equivalent study 22
A three-year diploma, trade certificate or apprenticeship AND at least 15 years of full-time or full-time equivalent study 22
A university degree of two years or more at the Bachelor’s level, AND at least 14 years of full-time or full-time equivalent study 20