I noticed that my parking spaces don't "attach" themselves to my surface. I also noticed that my ADA wheelcahir symbols DO "attach" themselves to my surface. So it turns out my parking spaces are parking components and my ADA W/C symbols are site components. I copied a parking space and changed the family typ to Site. I place one of my new spaces and voila!! It attached to my surface.
So, how do you do it and what are the advantages/disadvantages of each method?