I understood everything the first time I read it.
Call them and ask them what their purpose is since they were not in the kit.
I never said it wasn't a full drop kit. I can see the pictures, but what I had always heard was it was a knuckle lift, doesn't mean some are not like yours. Thing is I had heard they increase the track width being a knuckle kit, I could see the need for them, but in this case it's not that way it seems.
Ask them why you need them, ask em why they aint in the freakin kit when you drop a grand and 2 little spacers aint in it, how dumb. if you need em they should put them in the kit, they are dumb IMO for not doing so or so needing them. It just doesn't sound right to me, when it alll drops it all should be like stock and not need spacers. Now if it were a knuckle or increased track width then yes.