Platelet like bleeding in VWF is platelet adhesion defect

Platelet like bleeding in VWF is platelet adhesion defect,means platelet count will be normal,but how come its partial quantitative defect as platelet count is normal? In a bleeding case where there is normal platele count,we should think for qualitative defect.Then how come platelet adhesion disorder is quantitative defect? Rakesh s nair sir can you please clarify my doubt?

Type 1 Von Willebrand disease is called as partial quantitative defect due to the presence of 75-80% of normal Von Willebrand factor, and not on the basis of platelet count.

Thank you.