Hi again.
Unfortunately, some of your parking lots are traced in very low quality. For example this one: https://www.openstreetmap.org/way/1333568636

I would suggest that you switch your background to 'Esri World Imagery (Clarity) Beta' which would allow you to see parking lot outlines through trees canopies. Try drawing the area tightly along the outlines and avoid unnecessary overlaps with buildings or other objects.

Just let me know if you need help!
Cheers